A child sleds down a 3.5 m tall snowy hill.  Ignoring friction, determine the child’s speed at the bottom of the hill.

p12(1).png Suppose the car starts from rest at position 1. Ignoring friction, determine the car’s speed at position 4.

A 90.0 kg wide receiver traveling east at 15.0 m/s is tackled by a 115 kg linebacker traveling at 8.0 m/s in a direction of 300 west of north.  What are the speeds of the players (assume they stick together) just after the tackle?

A 90.0 kg wide receiver traveling east at 15.0 m/s is tackled by a 115 kg linebacker traveling at 8.0 m/s in a direction of 300 west of north.  What direction are the players traveling in just after the tackle? (assume they stick together)

An 125 kg astronaut, floating motionless in space, pushes away a 15 kg toolbox which goes flying off with a speed of 4.0 m/s.  What speed is the astronaut moving after pushing away the toolbox?

The contact time of a golf club with a 45 g golf ball is 3.5×10-3 s, during which time the club exerts an average force of 685 N on the ball.  Determine the speed of the ball just after contact.

Determine the linear momentum of a 3.0 kg object traveling at 12.0 m/s.

Three masses lie along the x-direction.  A mass M is at the origin, a mass 2M is at x = a, and a mass 3M is at position x = 2a.  Determine the position of the center of mass relative to the origin.

How fast are the riders of on a 36.0 m diameter Ferris wheel moving when it is rotating at 2.5 rpm?

How long does it take a dvd to spin up, from rest, to 675 rpm with an angular acceleration of 32.0 rad/s2?