All MCAT Physical Resources
Example Question #5 : 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?
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 #6 : General Principles
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?
We must know the velocity of each piece to solve
We must know the shape of the plate to solve
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