Questions from College Physics

Q: A 12.0-g bullet is fired horizontally into a

A 12.0-g bullet is fired horizontally into a 100-g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 150 N/m. The bullet beco...

Q: A 1200-kg car traveling initially with a speed of 25

A 1200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9000-kg truck moving in the same direction at 20.0 m/s (Fig. P6.44). The velocity of...

Q: A tennis ball of mass 57.0 g is held just

A tennis ball of mass 57.0 g is held just above a basketball of mass 590 g. With their centers vertically aligned, both balls are released from rest at the same time, falling through a distance of 1.2...

Q: A space probe, initially at rest, undergoes an internal mechanical

A space probe, initially at rest, undergoes an internal mechanical malfunction and breaks into three pieces. One piece of mass m1 = 48.0 kg travels in the positive x - direction at 12.0 m/s, and a sec...

Q: A 25.0-g object moving to the right at

A 25.0-g object moving to the right at 20.0 cm/s overtakes and collides elastically with a 10.0-g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision...

Q: A billiard ball rolling across a table at 1.50 m

A billiard ball rolling across a table at 1.50 m/s makes a headon elastic collision with an identical ball. Find the speed of each ball after the collision (a) When the second ball is initially at res...

Q: A 90.0-kg fullback running east with a speed

A 90.0-kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b...

Q: A planet has two moons with identical mass. Moon 1 is

A planet has two moons with identical mass. Moon 1 is in a circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. The magnitude of the gravitational force exerted by the planet on Moo...

Q: Identical twins, each with mass 55.0 kg, are

Identical twins, each with mass 55.0 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally a...

Q: A 2.00 x 103-kg car moving east at

A 2.00 x 103-kg car moving east at 10.0 m/s collides with a 3.00 x 103-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 40.0° north of east and a spe...