Newton's Laws

Front

What is Newton's First Law of Motion?

Back

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

Front

Define inertia.

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

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

Back

The unit of force is the Newton (N).

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 does it mean for forces to be unbalanced?

Back

Unbalanced forces are not equal and opposite, causing a change in the motion of an object.

Tags

NGSS.MS-PS2-2

Front

If a sled is moving, what will cause it to stop?

Back

An outside force, such as friction or a person stopping it, will cause the sled to stop.

Tags

NGSS.MS-PS2-2

Front

What is the force exerted by a surface on an object resting on it called?

Back

The force exerted by a surface on an object is called the normal force.

Front

If a weightlifter holds a barbell weighing 756 N, what force is he exerting?

Back

The weightlifter exerts a force of 756 N to hold the barbell up.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass, calculated as Weight = mass × gravity.

Tags

NGSS.MS-PS2-4

Front

What is an example of an unbalanced force in everyday life?

Back

A car accelerating when the driver presses the gas pedal is an example of an unbalanced force.

Tags

NGSS.HS-PS2-1