Physics Review (8th Grade)

Front

What happens when the net force on an object is zero?

Back

The forces on the object are balanced.

Front

How do you calculate the speed of an object?

Back

Speed = Distance / Time.

Front

What is the formula for calculating force?

Back

Force = Mass x Acceleration.

Front

What is acceleration?

Back

Changes in speed, direction, or both.

Front

What does a horizontal line on a distance vs. time graph represent?

Back

An object that is not moving at all.

Front

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

Back

Newton (N).

Front

What is the relationship between mass and acceleration in Newton's second law?

Back

As mass increases, acceleration decreases if the force is constant.

Front

What is the difference between speed and velocity?

Back

Speed is scalar (magnitude only), while velocity is vector (magnitude and direction).

Front

What is gravitational force?

Back

The force of attraction between two masses.

Front

What is the formula for calculating speed if an object travels 60 meters in 4 seconds?

Back

Speed = 60 m / 4 s = 15 m/s.