A girl on a skateboard is at rest. She is hit with a 10 kg medicine ball traveling at 5 m/s. The medicine ball comes to a stop. The girls and her skateboard have a combined mass of 35 kg. Assuming no friction, how fast
is she moving after being hit by the ball? (you must show all work for credit)

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//

there are no atoms