Two objects having masses m1 and m2 are connected to each other as shown in the figure and are released from rest. there is no friction on the table surface or in the pulley. the masses of the pulley and the string connecting the objects are completely negligible. what must be true about the tension t in the string just after the objects are released?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?