Unit 2 Forces and Motion Review

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

How does mass affect kinetic energy?

Back

Kinetic energy increases with an increase in mass.

Front

What is the formula for calculating average speed?

Back

The formula for average speed is s = d / t, where d is distance and t is time.

Front

What happens to kinetic energy when an object's speed increases?

Back

Kinetic energy increases as the speed of the object increases.

Front

Which marble will have the greatest kinetic energy when rolling down a ramp?

Back

The marble with the greatest mass will have the greatest kinetic energy.

Front

What is Newton's 1st law of motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What is Newton's 2nd law of motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is Newton's 3rd law of motion?

Back

For every action, there is an equal and opposite reaction.

Front

How do you calculate kinetic energy for a 7 kg ball traveling at 4 m/s?

Back

Using the formula KE = 1/2 mv², KE = 1/2 * 7 kg * (4 m/s)² = 56 Joules.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy is proportional to the square of the speed; if speed doubles, kinetic energy increases by a factor of four.