Suppose that you are riding a bike away from your dog who sits and watches you leave. if you use the bicycle as a reference frame, how does your dog appear to move?

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.