Ch. 4 Test Review

Front

What is the unit for acceleration?

Back

meter per second per second (m/s²)

Front

Can an object be in equilibrium if two forces are acting upon it?

Back

Yes

Front

What type of quantity is force?

Back

vector

Front

What law states that for every action, there is an equal and opposite reaction?

Back

Newton's 3rd Law of Motion

Front

If a 2-kg object is moving horizontally with a speed of 4 m/s, how much net force is required to keep it moving at this speed?

Back

0N

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (F = ma)

Front

What is the definition of equilibrium in physics?

Back

A state where the net force acting on an object is zero.

Front

What is the difference between a vector and a scalar quantity?

Back

A vector has both magnitude and direction, while a scalar has only magnitude.

Front

What does Newton's 1st Law of Motion state?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the acceleration of an object in free fall near the Earth's surface?

Back

Approximately 9.81 m/s².