Questions from Modern Physics


Q: A 0.60-kg book slides on a horizontal table

A 0.60-kg book slides on a horizontal table. The kinetic friction force on the book has magnitude 1.8 N. (a) How much work is done on the book by friction during a displacement of 3.0 m to the left? (...

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Q: A 45.0-kg woman stands up in a 60

A 45.0-kg woman stands up in a 60.0-kg canoe 5.00 m long. She walks from a point 1.00 m from one end to a point 1.00 m from the other end (Fig. P8.92). If you ignore resistance to motion of the canoe...

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Q: You are standing on a concrete slab that in turn is resting

You are standing on a concrete slab that in turn is resting on a frozen lake. Assume there is no friction between the slab and the ice. The slab has a weight five times your weight. If you begin walki...

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Q: In a fireworks display, a rocket is launched from the ground

In a fireworks display, a rocket is launched from the ground with a speed of 18.0 m>s and a direction of 51.0° above the horizontal. During the flight, the rocket explodes into two pieces of equal mas...

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Q: A 7.0-kg shell at rest explodes into two

A 7.0-kg shell at rest explodes into two fragments, one with a mass of 2.0 kg and the other with a mass of 5.0 kg. If the heavier fragment gains 100 J of kinetic energy from the explosion, how much ki...

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Q: A 20.0-kg projectile is fired at an angle

A 20.0-kg projectile is fired at an angle of 60.0° above the horizontal with a speed of 80.0 m/s. At the highest point of its trajectory, the projectile explodes into two fragments with equal mass, on...

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Q: A fireworks rocket is fired vertically upward. At its maximum height

A fireworks rocket is fired vertically upward. At its maximum height of 80.0 m, it explodes and breaks into two pieces: one with mass 1.40 kg and the other with mass 0.28 kg. In the explosion, 860 J o...

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Q: A 12.0-kg shell is launched at an angle

A 12.0-kg shell is launched at an angle of 55.0° above the horizontal with an initial speed of 150 m>s. At its highest point, the shell explodes into two fragments, one three times heavier than the ot...

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Q: An outlaw cuts loose a wagon with two boxes of gold,

An outlaw cuts loose a wagon with two boxes of gold, of total mass 300 kg, when the wagon is at rest 50 m up a 6.0° slope. The outlaw plans to have the wagon roll down the slope and across...

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Q: A 2004 Prius with a 150-lb driver and no passengers

A 2004 Prius with a 150-lb driver and no passengers weighs 3071 lb. The car is initially at rest. Starting at t = 0, a net horizontal force Fx(t) in the +x-direction is applied to the car. The force a...

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