Calculate the impulse using this force-time graph of a small cart being pushed.
0.060 kg • m/s
0.140 kg • m/s
0.100 kg • m/s
0.080 kg • m/s

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

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •