Question

1. kristina has three skateboards for her skateboarding competitions. the brown and pink skateboards are of equal mass and more massive than the green skateboard, which has the least mass. one day, she tested the skateboards by giving each a push, but not from the same direction. use the information in the diagram to answer. which skateboard(s) experienced the strongest force from kristinas push? how do you know? a the pink skateboard experienced the strongest force for two reasons: it is a more massive object and it has the fastest ending speed. b the brown skateboard experienced the strongest force because it requires more force to slow an object down than to speed it up. c the brown and pink skateboards experienced the strongest force because they are both more massive than the green skateboard and they changed speed by the same amount. d all three skateboards experienced the same strength force because they changed speed by the same amount.

Explanation:

Step1: Recall Newton's second law

$F = ma$ (Force = mass×acceleration).

Step2: Analyze mass - force relationship

Brown and pink have more mass than green.

Step3: Consider acceleration

If change in speed (related to acceleration) is same for brown, pink and green, more mass means more force. Since brown and pink are more massive and have same speed - change as each other, they experience stronger force than green.

Answer:

C. The brown and pink skateboards experienced the strongest force because they are both more massive than the green skateboard and they changed speed by the same amount.