Unit 2 Forces and Motion Review

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.

Kinetic energy increases with an increase in mass.

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

Kinetic energy increases as the speed of the object increases.

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

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.

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

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

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

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