STAAR Science 8 - Cat 2 Review

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it acts. It is measured in Joules (J).

Front

How do you calculate work done when pushing an object?

Back

Work (W) = Force (F) x Distance (d). For example, pushing a 50 N sofa up a 5 m ramp does 250 Joules of work.

Front

What is Newton's first law of motion?

Back

An object in motion will remain in motion at a constant velocity unless acted upon by an unbalanced force.

Front

What happens to a moving object when no net force acts on it?

Back

It will continue to move at a constant velocity.

Front

What type of energy does a battery convert?

Back

A battery converts chemical energy into electrical energy.

Front

What is the relationship between mass and acceleration when the same force is applied?

Back

The object with less mass will accelerate more than the object with more mass when the same force is applied.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) = Change in velocity (Δv) / Time (t).

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, acting parallel to the surfaces in contact.

Front

How does mass affect the speed of an object when the same force is applied?

Back

An object with less mass will travel faster than an object with more mass when the same force is applied.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).