Unit 2 Review

Front

What is Newton's Third Law of Motion?

Back

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

Front

How does Newton's Third Law explain rocket propulsion?

Back

The hot gases expelled from the rocket move in one direction, while the rocket moves in the opposite direction with equal force.

Front

What are the energy transformations in a fire?

Back

Chemical energy transforms into thermal energy.

Front

What happens to an object's velocity when a force acts on it in the opposite direction?

Back

The object's velocity will decrease.

Front

What type of speed is represented by a horizontal line on a distance-time graph?

Back

Constant speed.

Front

What is the definition of thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What does a steep slope on a distance-time graph indicate?

Back

A steep slope indicates a high speed.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the role of friction in motion?

Back

Friction opposes the motion of an object, causing it to slow down.