Unit 7 Forces and Motion - Lesson 1 Forces

In science, a force is simply a _____ or a _____

• kick, punch

• push, pull

• run, jump

Name the unit used to express force.

• meter

• pound

• newton

• joule

Forces always cause an object to move.

• False

• True

A force exerted during contact between objects is a contact force.

• False

• True

Friction is an example of a contact force between two surfaces.

• True

• False

Two types of friction are _____ and _____.

• balanced and unbalanced

• push and pull

• static and kinetic

Static friction is the force that resists the start of sliding motion between two surfaces that are touching.

• True

• False

Kinetic friction is the force that resists the movement of two surfaces that are touching and are moving relative to each other.

• True

• False

What is a friction-like force that opposes the motion of an object in a fluid called?

• motion

• resistance

• drag

• pull

A force can act on an object from a distance.

• False

• True