Newton’s laws

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Question 8
Medium

Two skaters are standing, at rest, opposite each other on an ice rink.

Skater X has a mass of 45 kg45\text{ kg}45 kg and skater Y has a mass of 60 kg60\text{ kg}60 kg.

Two skaters, labeled X (45 kg) and Y (60 kg) respectively, stand facing each other on the ice with hands touching ready to push off.

Skater X pushes against skater Y with a force of 45 N45\text{ N}45 N.

a.

What does Newton’s third law tell us about the force that skater X experiences from skater Y?

[2]
b.

Calculate the acceleration of skater Y when they are pushed with the force of 45 N45\text{ N}45 N. Use the equation: force=mass×acceleration\text{force} = \text{mass} \times \text{acceleration}force=mass×acceleration

[3]
c.

State the total momentum of both skaters before skater X pushes skater Y.

[1]
d.

After pushing skater Y, skater X has a velocity of 2.4 m/s2.4\text{ m/s}2.4 m/s. Calculate the momentum of skater X. Use the equation: momentum=mass×velocity\text{momentum} = \text{mass} \times \text{velocity}momentum=mass×velocity

[2]
e.

Calculate the velocity of skater Y after being pushed by skater X.

[3]

Newton’s laws Questions

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