Lesson 4: Forces

When the net force is not ____ N, the forces on an object are unbalanced.

• Zero

• One

• Two

• Three

Inertia is the tendency of an object to resist a change in ______.

Newton's second law states that Force equals

• mass times velocity

• speed divided by distance

• mass times acceleration

• acceleration times speed

When forces are unbalanced, the object will accelerate in the direction of the...

• greatest wind

• inertia

• smaller mass

• net force

What vocabulary word means the tendency of an object to resist a change in motion.

A push or pull exerted on an object is called...

• net force

• force

• inertia

• mass

Two forces are applied on a soccer ball. Which of the following statements explains why the ball accelerates?

• The net force applied to the ball is 0 N.

• The ball resists one force but not another.

• Newton's second law does not apply to round objects.

• The two forces are unbalanced.

When the same force is applied to two objects- one with a large mass and one with a small mass- which one will show a larger acceleration?

Which of the following are NOT an examples of a force that acts at a distance?

• Gravity

• Kicking a ball

• Magnets

• Pushing a toy

• 16.6 N

• 74.2 N

• 294 N

• 65.8 N