Week 3 Assessment: Forces and Newton’s Laws of Motion

What is a force?

• A type of object

• A kind of energy drink

• A push or pull on an object

• A type of temperature

What unit is used to measure force?

• Joules

• Kilograms

• Watts

• Newtons

What does it mean if forces on an object are balanced?

• The object speeds up

• The object changes direction

• The net force is zero

• The object explodes

What is the result of unbalanced forces acting on an object?

• No motion occurs

• Acceleration occurs

• Friction disappears

• Mass is created

Newton’s First Law is also known as the Law of:

• Gravity

• Inertia

• Acceleration

• Energy

According to Newton’s First Law, what happens to an object at rest?

• It always moves

• It stays at rest unless acted upon by a force

• It falls over

• It loses energy

What is Newton’s Second Law formula?

• F = m × a

• F = a ÷ m

• F = m ÷ a

• F = v × t

If a 10 kg object accelerates at 3 m/s², what is the net force acting on it?

• 3 N

• 30 N

• 13 N

• 300 N

Newton’s Third Law states:

• Force equals mass times energy

• Action and reaction are equal and opposite

• The heavier object wins

• Gravity pulls everything equally

Which is an example of Newton’s Third Law?

• A ball rolling to a stop

• A paper airplane flying straight

• A person jumping off a boat and the boat moves backward

• A leaf falling from a tree