Unit 3 Practice For Test

Front

What is the weight of an object?

Back

The weight of an object is the force exerted on it due to gravity, typically measured in newtons (N).

Front

What upward force is needed to hold an object motionless?

Back

The upward force needed to hold an object motionless is equal to its weight.

Front

What is Newton's First Law of Motion?

Back

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

Front

What is a net force?

Back

A net force is the overall force acting on an object when all the individual forces are combined.

Front

What happens to an object when a net force acts on it?

Back

When a net force acts on an object, it causes the object to accelerate in the direction of the net force.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, typically measured in meters per second squared (m/s²).

Front

If a table is pushed with 25 N of force and does not move, what is the force exerted by the table?

Back

The table exerts an equal and opposite force of 25 N back on the person pushing it.

Front

What is the relationship between force and motion?

Back

A net force is required to change the motion of an object, either to speed it up, slow it down, or change its direction.

Front

What does it mean for forces to be balanced?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Front

What is the formula for calculating weight?

Back

Weight (W) = mass (m) × acceleration due to gravity (g), where g is approximately 9.81 m/s² on Earth.