Question

which puck(s) experienced the strongest force when hit? how do you know? a all three hockey pucks experienced the same force because they changed speed by the same amount. b the black hockey puck; it is more massive and has the fastest ending speed. c the purple hockey puck; it takes a stronger force to slow down a more massive object than to speed it up. d the black and purple hockey pucks; they have more mass than the green puck, but changed speed by the same amount.

Explanation:

According to Newton's second - law of motion $F = ma$ (force equals mass times acceleration). If the change in speed (acceleration) is the same, a more massive object will experience a greater force. The black and purple pucks have more mass than the green puck and changed speed by the same amount, so they experience a greater force than the green puck.

Answer:

d. The black and purple hockey pucks; they have more mass than the green puck, but changed speed by the same amount.