Question

1. hockey is a sport in which players use hockey sticks to push a puck across smooth ice. at practice one day, three different - colored hockey pucks were sliding on the ice. the green hockey puck has less mass than the black and purple hockey pucks, which have the same mass. a player hit each hockey puck with a stick, but not from the same direction. use the information in the diagram to answer. 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:

Step1: Recall Newton's second law

$F = ma$ (Force = mass×acceleration).

Step2: Analyze acceleration

Acceleration is change in speed. If change - in - speed is the same for different masses.

Step3: Determine force

Greater mass with same acceleration means greater force. Black and purple pucks have more mass than green puck and same speed - change, so they experience greater force.

Answer:

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