Net Force/Friction/Newton's 3rd Law/Momentum Review

A force acting in the opposite direction of an object in motion

• Gravity
• Buoyant
• Friction
• Normal

What is the net force in this diagram?

• 8N right
• 2 N right
• 8N left
• 2N left

Tags

NGSS.MS-PS2-2

What is the net force of an object that is not moving?

• 0N
• 100N
• Upward force

Tags

NGSS.HS-PS2-1

Why does a book on a table not move?

• No forces are acting on the book
• Gravity is the only force acting on the book
• Forces of the table pushing up and gravity pulling down are balanced

Find the net force

• 0N
• 50N
• 50N to the left
• 50N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

True or false: You can't exert a force on anything unless it also exerts a force on you.

• True
• False

Tags

NGSS.MS-PS2-1

What causes a rocket to lift off and accelerate?

• The rocket is propelled by the impact of exhaust gases against the atmosphere.
• The rocket is propelled by the recoil from the ejected gas.
• Magic

Newton's third law is the law of __________________.

• action and reaction
• inertia
• acceleration
• science rocks

Tags

NGSS.MS-PS2-1

Which best explains why we are able to accelerate forward when starting to run?

• As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
• No acceleration takes place. Runners are always at a fixed velocity.
• The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
• The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck.

• True
• False

Tags

NGSS.MS-PS2-1