Flashcard: Forces

Front

What is a non-contact force?

Back

A force that acts on an object without physical contact, such as gravitational force between the Earth and the Moon.

Front

What is a contact force?

Back

A force that acts on an object through direct physical contact, such as sitting in a chair.

Front

What does it mean if an object is not accelerating?

Back

The net force acting on the object is zero.

Front

What can be said about an object moving at constant velocity?

Back

The net forces acting on the object are zero.

Front

What are the two components of a vector quantity?

Back

Magnitude and Direction.

Front

What is gravitational force?

Back

A non-contact force that attracts two bodies towards each other, such as the Earth attracting an apple.

Front

What is friction?

Back

A contact force that opposes the motion of an object when it is in contact with another surface.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

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 unless acted upon by a net external force.

Front

What is acceleration?

Back

The rate of change of velocity of an object, which can be caused by a net force acting on it.