Unit Exam 3

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

• Balanced

• Magnetic

• Spring

• Unbalanced

Which law of motion says that you must push or pull objects harder if they have more mass?

• 1st

• 2nd

• 3rd

• 4th

What law is best described by inertia?

• 1st

• 2nd

• 3rd

• law of conservation of mass

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

• The Law of Inertia (1st law)

• The Law of Acceleration (2nd law)

• The Law of Conservation of Momentum

• Action Reaction Law (3rd law)

What Unit do we Measure Force in?

• Newtons

• Joules

• Force

• Kilograms

What is Newton's First Law

• F=ma

• Every action has an equal and opposite reaction

• An object at rest stays at rest, an object in motion stays in motion.

• Friction

A 20 kg bike accelerates at 10 m/s2. what was the force

F = m x a

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar

• Equal and opposite

• Equal and different

• Greater and opposite

Which of Newton's laws is shown

• 1st law

• 3rd law

• 2nd law

If there is a big mass, it would need a stronger force to accelerate it. Which law does this describe?

• 3rd law

• 1st law

• 2nd law