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Example Questions
Example Question #1 : General Principles
A
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:
Explanation:
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 #1 : 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:
Explanation:
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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