Force and Motion Grade 6

Tendency of an object to resist a change in motion

• friction

• mass

• inertia

• law of inertia

• unbalanced force

Inertia is the tendency of an object to resist motion.

• True

• False

Newton’s first law of motion is also called the law of acceleration.

• True

• False

If an object is at rest, inertia will keep it at rest.

• True

• False

The speed of an object changes only when it is acted on by an unbalanced force.

• True

• False

When you are moving at a high rate of speed, having a larger mass makes it harder to stop.

• True

• False

Newton’s first law of motion applies only to objects that are already moving.

• True

• False

Gravity is a ____________.

• velocity

• speed

• force

• weight

Inertia explains why ____________.

• friction can be overcome for all objects

• people in a car move forward in their seats when the car stops quickly

• gravitational forces are stronger on Earth than on the Moon

• the ground pushes against your feet when you run

An object is accelerated when it is acted on by ____________.

• an unbalanced force

• a balanced force

• velocity

• inertia