8th Grade Science AAP Study Tools

Going down a hill a 12 kg sled has a force of 36 N. What is its acceleration?

• 1 m/s^2

• 2 m/s^2

• 3 m/s^2

• 4 m/s^2

What force acts against motion?

• Gravity

• Friction

• Magnetism

• Inertia

A net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5 m/s2. What is the mass of the encyclopedia?

• 2 kilograms

• 3 kilograms

• 4 kilograms

• 5 kilograms

Which law? Forces always act in equal and opposite pairs.

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Fourth Law

Which law? For every action there is an equal and opposite reaction.

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Law of Universal Gravitation

Which law? A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• Newton's First Law (Inertia)

• Newton's Second Law (Force)

• Newton's Third Law (Action-Reaction)

• Law of Universal Gravitation

If you push on a wall with a force of 10 Newtons, how much force is acting on you?

• 10 Newtons in the same direction

• 5 Newtons in the opposite direction

• 10 Newtons in the opposite direction

• 15 Newtons in the same direction

What happens when unbalanced forces act on an object at rest?

• The object remains at rest and does not move.

• The object begins moving in the direction of the net force.

• The object starts spinning in place.

• The object moves randomly in any direction.

Which has more Inertia?

• a) Truck

• b) A skateboard

• c) Ant

• d) A cat

Who is the famous British scientist and mathematician who discovered the laws of motion?

• Sir Isaac Newton

• Albert Einstein

• Charles Darwin

• James Clerk Maxwell