Front

What happens when objects collide elastically?

Back

They must bounce off of each other.

Front

What is the force that causes objects to fall to Earth?

Back

Gravity

Front

What force is produced when two objects rub together?

Back

Friction

Front

What is velocity?

Back

The rate of change of displacement.

Front

What is the acceleration of an object moving at constant velocity?

Back

0 m/s².

Front

What is the definition of gravity?

Back

A force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is friction?

Back

A force that opposes the motion of an object when it is in contact with another surface.

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 is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What is the unit of force in the International System of Units (SI)?

Back

Newton (N).