A projectile is launched from the ground at an angle of 15° above the horizontal. If the projectile is launched at the same velocity at an angle of _____, it will travel the same horizontal distance.

A 1640 kg merry-go-round with a radius of 7.50 m accelerates from rest to a rate of 1.00 revolution per 8.00 s. Estimate the merry-go-round as a solid cylinder and determine the net work needed for this acceleration.

A meter stick is supported at the 50-cm mark. A 0.40 kg mass is hanging at the 20 cm mark and a 0.60 kg hanging at the 80-cm mark. Where should a third mass that weighs 0.30 kg be hung to keep the stick balanced?

The escape velocity at the surface of Earth is 8 km/s. What is the escape velocity at the surface of a planet whose radius is 4 times and whose mass is 100 times that of Earth?

In an inelastic collision, the final total momentum is _____

A 1300 kg sports car can accelerate from 0 to 27 m/s in 5.2 seconds. How much power from the engine is directly going into accelerating the car?

A 5-kg fish moving at a speed of 1 m/s swallows 1-kg fish at rest. Its speed after this is:

A 1500-kg car moving at 15 m/s strikes another car at rest. The two cars continue to move together at 10 m/s. What was the mass of the second car?

A wheel rolling on a horizontal surface with an angular speed of 2.5 rad/s gets on a ramp and rolls down the ramp with a constant angular acceleration of 2.0 rad/s2. If it takes 11.5 s to reach the bottom of the ramp, what is the final angular speed of the wheel at the bottom?

An 800-N box is pushed up an inclined plane. The plane is 4.0 m long and 2.0 m high. If it requires 3200 J of work to get the box to the top of the plane, what was the magnitude of the average friction force on the box?