Unit 7 Forces Review

______ forces affect the motion of an object by speeding it up, slowing it down, or changing the direction of it.

• Balanced
• Strong
• Unbalanced
• WeaK

Which law of motion states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force?

• Newton's 1st Law of Motion
• Newton's 2nd Law of Motion
• Newton's 3rd Law of Motion

An object's resistance to its change in motion is its

• Friction
• Inertia
• Gravity
• Pressure

As the force applied to an object increases, its acceleration______

• decreases
• increases
• stays the same
• does not exist

As the mass of an object decreases, its acceleration _______

• decreases
• increases
• stays the same
• does not exist

A hiker pushed on a large rock, but it did not move. He pushed 300 N to the left. How much force does he feel from the rock?

• Less than 300

• 300

• More then 300

The combination of all forces acting on an object is called __________

• Parallelogram Rule
• Net Force
• Vector Quantity
• All the Jedi's using their abilities together

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

• 25 Newtons
• 20 Newtons
• 200 Newtons
• 10 Newtons

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

• 20 m/s²

• 0.5 m/s²

• 2 m/s²

• 120 N

What is a force?

• When you try really hard

• When you move

• A push or a pull