MCAT Physical : Newton's Laws

Study concepts, example questions & explanations for MCAT Physical

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Example Questions

Example Question #1 : Newton's Laws

ball is rolled into a stationary ball. If the heavier ball applies a  force on the smaller ball, what force will the smaller ball apply on the large ball?

Possible Answers:

Correct answer:


The answer to this question lies within Newton's third law: for every action, there is an equal and opposite reaction. If the large ball applies a  force on the smaller ball, the smaller ball will apply a  force on the large ball in the opposite (negative) direction.

Example Question #2 : Newton's Laws

A 1kg plate falls from a shelf 1m above the ground and breaks into three pieces of mass 0.1kg, 0.4kg and 0.5kg. What is the total energy of the scattered pieces?

Possible Answers:

We must know the shape of the plate to solve

We must know the velocity of each piece to solve

Correct answer:


This is a conservation of energy question. The event is the collision. The initial energy can be calculated by gravitational potential energy:

The final total energy must be the same. The energy of the scattered pieces must add to 

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