A 1290 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 2000 N crate hangs from the far end of the beam.
(a) Calculate the magnitude of the tension in the wire.
(b) Calculate the magnitude of the horizontal and vertical components of the force that the wall exerts on the left end of the beam.
4. [SerCP7 3.P.022.] One of the fastest recorded pitches in major-league baseball, thrown by Billy Wagner in 2003, was clocked at 101.0 mi/h (Fig. P3.22). If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away?
One of the fastest recorded pitches major-league baseball, thrown by Nolan Ryan in 1974, was clocked at 100.8 mi/hr. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate 60.0 ft away?Seen 1 years ago William Damian 0 answers
1) Suppose the polar bear was running on land instead of swimming. If the polar bear runs at a speed of about 8.3 m/s, How far will it travel in 10.0 hours?
2) Like the polar bear, The walrus is a strong swimmer, Although it does not have the same endurance. For short periods of time, A walrus can swim at an average speed of 9.7 m/s. How far would a walrus swim at this speed in 3.4 mintues?
3) The maximum posted speed limit on the U.S. interstate highway system is found in rural areas of several western states. This maximum speed is 75 mi/h, or 121 km/h. What is the distance, In kilometers, that a car travels if it moves continuously at this speed for 3 hours and 20 mintues?
4) For normal sitiuations, The minimum speed limit throughout the U.S. interstate highway system is 45 mi/h, ir 72 km/h. How far, In kilometers, Will a car travel if it moves continuously at this speed for 3 hours and 20 mintues?
5) Various types of tree sloths share the honor of being the slowest moving mammals. An average tree sloth moves at a speed of 0.743 m/s. How long does it take a sloth moving at this speed to travel 22.30 m?
6) The longest stretch of straight railroad track lies across the desolate nullarbor plain, Between the Austrailian cities of Adelaide and Perth. The tracks extend a distance of 478 km without a curve. How long would it take a train, Moving at a constant speed of 97 km/h, To travel this length of track?
7) The concorde is the fastest supersonic Passenger jet, How long would the concorde take to travel 6,265 km between New York City and London, Assuming that the jet travels at its maximum speed of 2.150 times 10^3 km/h during the entire trip?
8) The longest distance in a track-and-field event is the 10 km run. The record holder for the women's 10 km run is Wang Junxia of China. Assuming that she ran 10.00 km at an average speed of 5.644 m/s, What was her time?
I'm confused about how to set up the following relative velocity problem:
George V Coast in Antarctica is the windiest place on Earth. Wind speeds there can reach 3.00e10^2 km/h. If a research plane flies against the wind with a speed of 4.50e10^2 km/h relative to the wind, how long does it take the plane to fly between two research stations that are 250 km apart?
A perfect spring whose spring constant is 2100 N/m is attached to a 35kg cart that slides on a frictionless horizontal surface. The spring is compressed from its equilibrium position and released. During the compression the system gains 672 joules of energy.
a) Find the maximum distance that the spring was compressed from equilibrium.
b) Find the potential energy stored in the spring when x=0.20 meter.
c) Find the speed of the cart when x= 0.20 meter.
A particle passes through the origin with an initial speed of 5.2 m/s in the positive y direction. The particle accelerates in the negative x direction at 5.2 m/s2. (a) What are its x and y positions after 4.5 s? _____m (x position) _____m (y position)
(b) What are vx and vy at this time?
_____m/s (vx) _____m/s (vy)
A car travels along a straight, level road. The car begins a distance x = 28.5 m from the origin at t = 0.0 s. At t = 5.1 s the car is at x = 100 m; at t = 7.2 s it isat x = 200 m. Find the average velocity of the car during the interval from t = 0.0 s to t = 5.1 sSeen 1 years ago James Charlie 3 answers
A wire of resistivity ? must be replaced in a circuit by a wire four times as long. If, however, the total resistance is to remain as before, the diameter of the newwire must
1) be two times smaller.
2) be four times smaller.
3) be four times larger.
4) remain unchanged.
5) be two times larger
Two spheres are launched horizontally from a 1.1m -high table. Sphere A is launched with an initial speed of 5.0M/S . Sphere B is launched with an initial speed of 3.0M/S
A. What is the time for the sphere A to hit the floor? and sphere B to hit the ground
B. What is the distance that sphere A travels from the edge of the table? And what is the distance for sphere B travels from edge of the table??
Question: Find the velocity in meters per second of a swimmer who swims 110 m toward the shores in 72 s?
Question 2: Find the velocity in meters per second of a baseball thrown 38 m from third base to first base in 1.7 s?
Question 3: Calculate the displacement in meters that a cyclist would travel in 5.00 h at an average velocity of 12.0 km/h to the southwest? (Remember to include direction)
(And I need to know the anwser to solve these problems)
You are practicing throwing darts in your dorm. You stand 2.69 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at apoint 1.98 m above the ground. The dart strikes the board at a point 1.77 m from the ground.
Calculate the time of flight of the dart.
A tennis player aims to serve the ball horizontally when their racquet is 2.5 m above the ground. The distance from the player to the net is 15.0 m and the net is 0.9 m high
(a) What is the minimum speed with which the ball must leave the racquet if it is to just clear the net?
(b) How far beyond the net does the ball land?
(c) If the distance from the net to the service line is 7.0 m is the ball “in” or “out’?
(d) What is the total time for which the ball is in the air from the time that it leaves the racquet until it hits the ground?
When two or more capacitors are connected in parallel to a battery,
a) the equivalent capacitance of the combination is less than the capacitance of any one of the capacitors.
b) each capacitor carries the same amount of charge.
c) the voltage across each capacitor is the same.
d) all of the given answers
e) none of the given answers
A 124- balloon carrying a 22- basket is descending with a constant downward velocity of 27.4 A 1.0- stone is thrown from the basket with an initial velocity of 20.0 perpendicular to the path of the descending balloon, as measured relative to a person at rest in the basket. The person in the basket sees the stone hit the ground 5.20 after being thrown. Assume that the balloon continues its downward descent with the same constant speed of 27.4 .How high was the balloon when the rock was thrown out?Seen 1 years ago Harvey obrien 0 answers
A mass m1 = 5.6 kg rests on a frictionless table. It is connected by a massless and frictionless pulley to a second mass m2 = 3.8 kg that hangs freely.
1) What is the magnitude of the acceleration of block 1?
2) What is the tension in the string?
Now the table is tilted at an angle of ? = 69.0° with respect to the vertical. Find the magnitude of the new acceleration of block 1.
4) At what “critical” angle will the blocks NOT accelerate at all?
5) Now the angle is decreased past the “critical” angle so the system accelerates in the opposite direction. If ? = 19.0° find the magnitude of the acceleration.
6) Compare the tension in the string in each of the above cases on the incline:
T? at 69.0° = T?critical = T? at 19.0°
T? at 69.0° > T?critical > T? at 19.0°
T? at 69.0° < T?critical < T? at 19.0°
You are standing at the foot of the Bank of America building in San Francisco, which is 52 floors (237 m) high. You launch a ball straight up in the air from the edge of the foot of the building. The initial vertical speed is 70 m/s.
a. How high up does the ball go?
b. How fast is the ball going right before it hits the top of the building?
c. For how many seconds total is the ball in the air?
(Not sure which equation to use, that's the main reason why I'm asking the question. I don't want to use the wrong equation.)
Volume of Box: 1.04*10^7m3
Density of Marble: 2.53*10^3kg/m3
How many marbles could fit into the equipment box?Consider 11% of the volume of the box to consist of the empty space between marbles, so that only 89% of the boxvolume actually contains glass. Calculate the mass of this many marbles in kilograms.
A nail gun fires a nail into a piece of wood. The nail is going a velocity of 9.0 m/s right before entering
the wood. The mass of the nail is 0.060 kg and the average force on the nail is 6.1 N.
(a) Find the acceleration of the nail.
(b) How far into the wood does the nail go?
(c) From entering the wood, how long does it take the nail to come to a stop?
Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kilometers to the supermarket, which is 5.0 kilometers from her own home. She walked the total distance in 1.5 hours. What were her average speed and average velocity?Seen 1 years ago Gelbero Wilson 1 answers
Two copper cylinders, immersed in a water tank at 50.0 oC contain helium and nitrogen, respectively. The helium-filled cylinder has a volume twice aslarge as the nitrogen-filled cylinder.a) Calculate the average kinetic energy of a helium molecule and the average kinetic energy of a nitrogen molecule.b) Determine the molar specific heat at constant volume.c) Find γ for the two gases. (ratio of molar specific heats)Please include all formulas, equations, and work. Use units wherever possible. Lifesaver for the first clear answer. Thanks!Seen 1 years ago Garcia 0 answers
The handle of a M = 22 kg lawnmower makes a = 35 degree angle with the horizontal.
If the coefficient of friction between lawnmower and ground is µs = 0.68, what magnitude of force is required to push the mower at constant velocity? Assume the forceis applied in the direction of the handle. Compare with the mowers weight.
Figure P24.63 shows a radio-wave transmitter and a receiver,both h = 52.0 m above theground and d = 550 m apart.The receiver can receivesignals directly from the transmitter, andindirectly, from signals that bounce off the ground.
Figure P24.63If the ground is level between the transmitter and receiver and a/2phase shift occurs uponreflection, determine the longestwavelengths that interfere in the following manner.(a) constructively
mThank you so much
Two archers shoot arrows in the same direction from the sameplace with the same initial speeds but at different angles. One shoots at 45o above thehorizontal, while the othershoots at 60.0o.If the arrow launched at45o lands 225 m from the archer, how far apart are thetwo arrowswhen they land?(You can assume that the arrowsstart at essentially ground level.)Seen 1 years ago Rodriguez 0 answers
A batter hits a softball over a third baseman's head with speed and at an angle from the horizontal. Immediately after the ball is hit, the third baseman turns and runs at a constant velocity , for a time . He then catches the ball at the same height at which it left the bat. The third baseman was initially from home plate (the location where the ball was hit from). Find . Use for the magnitude of the acceleration due to gravity. Assume that there is no air resistance. Find the angle in degrees. Find the components and of the ball’s velocity, , 0.100 before the ball is caught.Seen 1 years ago Harry Callum 0 answers
The4.00-kg block in the figureis attached to a vertical rod bymeans of two strings. When the system rotates about the axis of therod, the strings areextended as shown in the diagram and thetension in the upper string is 80.0 N.a)What is the tension in the lower cord?b)How many revolutions per minute does thesystem make?c)Find the number of revolutions per minute atwhich the lower cord just goes slack.please show me and explain to me how can isolve itSeen 1 years ago Adams 1 answers
1.Twospeakers on opposite sides of a concert stage are producingidentical sound waves with awavelength of 0.8 m. Consider only thedirect waves coming straight from the speakers neglecting wavesreflected from the ceiling, walls. etc. With onlyone speaker on ata time, at some point in the audience, the wave from one speakerhas a pressure amplitude of 12 N/m2 and the wave fromtheother speaker has an amplitude of 6 N/m2. With bothspeakers on, what is the amplitude of the pressure oscillations (inN/m2) ifthe point in the audience is at equal distancesfrom both speakers?
2.Sameconditions as in the previous question, except the individualamplitudes are 9 and 7N/m2 and the point in theaudience is 0.4 m farther from one speaker than the other. Theamplitude with both speakers on is then(inN/m2)
3.Sameconditions as in the previous questions, except the individualamplitudes are 10 and 7N/m2 and the point in theaudience is 0.8 m farther from one speaker than the other. Theamplitude with both speakers on is then (inN/m2)
4.Why must the function generator be precisely tuned to aparticular frequency in this experiment?
a. If the frequency is not set to thecorrect frequency, thewavelength will change.
b. If the frequency isnot set to thecorrect frequency, the speed of sound will change.
c. If the frequency is not set to thecorrect frequency, the amplitude of the sound wave will be toosmall.
d. If the frequency isnot set to the correct frequency, theamplitude of the sound wavewill be too big.
5.Equations 2 and 3 are supposed to give nearly the samevalue of Δ l. The value usingEq. 3 with r=19 cm, d=7cm, and θ=30o is 3.5 cm. How much smallerthan this (in cm) is the value obtained using Eq.~2? Giveyouranswer to the nearest 0.001 cm.
A Nichrome wire 36 cm long and 0.25 mmin diameter is connected to a 1.3 voltflashlight battery. What is the electric field inside the wire?
The wire is replaced by a different Nichrome wire with the samelength, but diameter 0.40 mm. Now whatis the electric field inside the wire?
The following charges are located inside a submarine: 4.00 µC, -9.00 µC, 27.0 µC, and-58.0 µC.(a) Calculate the net electric flux through thehull of the submarine.
Your answer differs from the correct answerby orders of magnitude.N·m2/C
(b) Isthe number of electric field lines leaving the submarine greaterthan, equal to, or less thanthe number entering it?equaltolessthangreaterthan
Josh starts his sled at the top of a 2.1 m-high hill that has a constant slope of 25 ^circ . After reaching the bottom, he slides across a horizontal patch of snow.The hill is frictionless, but the coefficient of kinetic friction between his sled and the snow is 0.08.
How far from the base of the hill does he end up?
In the figure below, m1 = 10.0 kg and m2 = 4.5 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kineticfriction is 0.30.
(a) If the system is released from rest, what will its acceleration be?
(b) If the system is set in motion with m2 moving downward, what will be the acceleration of the system?
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