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: Analyze Newton's Second Law

According to \(F = ma\) (force = mass × acceleration). When the force is the same, the smaller the mass, the larger the acceleration. When the push (force) is given, the object with less mass will change its motion state (speed up or slow down) more easily.

Step2: Compare the masses and the effect of force

The green skate - board has the least mass. According to \(F = ma\), for a given force \(F\), \(a=\frac{F}{m}\). Since \(m_{green}

Answer:

B. The brown skateboard experienced the strongest force because it requires more force to slow an object down than to speed it up.