1. A boy moves on a skateboard at a constant velocity of 3 ms. The combined mass of the boy and the skateboard is 40 kg. He catches a bag of
flour of mass 5 kg that is thrown to him horizontally at 6 ms. Determine
the velocity of the boy after catching the bag of flour. (2 m-s in his original
direction)
to the left​

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                                         : )

the answer to this is proletariats.

hope this : )

inverse v=i*r

nice nice