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1. A bullet with a mass of 5.00 ´ 10 kg is loaded into a gun. The loaded gun has a mass of 0.52 kg. The bullet is fired, causing the empty gun to recoil at a speed of 2.1 m/s. What is the speed of the bullet? 2.On a pool table, a moving cue ball collides with the eight ball, which is at rest. Is it possible for both balls to be at rest after the collision? Use the law of conservation of momentum to explain your reasoning. 3.In the following sentence, is the everyday meaning or the scientific meaning of work intended? A coach does work on the bleachers by moving them into place before the basketball game. 4.A toy car X of mass 0.200 kg moves along a frictionless surface with a velocity of 0.180 m/s. It collides with another toy car Y, with a mass of 0.250 kg and a speed of 0.130 m/s in the same direction. After the collision, toy car X continues to move in the same direction with a velocity of 0.177 m/s. Calculate the speed of toy car Y after the collision. 5.Air exerts a force on a leaf as it falls from a tree to Earth. Is the work done on the leaf positive, negative, or zero? 6. An astronaut with a mass of 85 kg is outside a space capsule when the tether line breaks. To return to the capsule, the astronaut throws a 2.0 kg wrench away from the capsule at a speed of 14 m/s. At what speed does the astronaut move toward the capsule? 7.Explain the scientific meaning of work 8. Is it possible for a spaceship traveling with constant velocity to experience a change in momentum? Explain your answer 9.A force is applied to stop a moving shopping cart. How would increasing the time interval change the force required? 10.How is work related to force and displacement? 11. Two carts with masses of 1.5 kg and 0.75 kg, respectively, are held together by a compressed spring. When released, the 1.5 kg cart moves to the left with a velocity of 3.4 m/s. What is the velocity of the 0.75 kg cart? (Disregard the mass of the spring.) 12.A car travels at a speed of 25 m/s on a flat stretch of road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. Are any forces doing work on the car? Explain your answer.
a space vehicle is coasting at a constant velocity of 15.7 ms in the y direction relative to a space station. the pilot
hearing damage may occur when a person is exposed to a sound intensity level of 90.0 db relative to the threshold of
A constant magnetic field of 0.64 T is applied across the electron beam in a cathode ray tube. The deflection of the beam on the face of the tube is 2.4cm when the accelerating voltage is 640V. What accelerating voltage would result in a deflectio..
Find the torque exerted by a force vector F = 2j + 6k that is applied at position r = 4i-3j + k. The force is given in newtons and the position is in meters.
A 1500 kg truck rolls at 2.5 m/s under a loading bin and receives a 3500 kg load. What is its new velocity?
What is the rms power delivered to the transformer? Assume an ideal transformer.
Starting 4.0m from a department store mirror, How far is Suzanne from her image in the mirror after 1.0s
Our balance is maintained, at least in part, by the endolymph fluid in the inner ear. Spinning displaces this fluid, causing dizziness. What is the radial acceleration (in m/s2) of the endolymph fluid
Breathing deep, your professor inhales air at 0.203 m/s. As the air goes through a constriction in his bronchus, it doubles in speed. How much does the air pressure drop in the constriction
A railroad car of mass 2.70 multiplied by 104 kg moving at 4.00 m/s collides and couples with two coupledrailroad cars, each of the same mass as the single car and movingin the same direction at 1.20 m/s.
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.6 s later. How deep is the ocean at this point
four passengers with combined mass 250 kg compress the springs of a car with worn out shock absorbers by 4.00cm when
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