Law of Interaction

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

Tags

NGSS.MS-PS2-1

A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the book from accelerating downward at 9.8 m/sec²

• The table presses back up on the book with an equal and opposite force of 20 newtons.

• The table presses back up on the book with a force greater than 20 newtons.

• The table and the book together are accelerating downwards at 9.8 m/sec²

• The inertia of the book holds it up

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

You hit a wall with a stick.  The equal but opposite reaction is _____

• the wall pushes against you
• the stick pushes against you
• you push against the stick
• the wall pushes against the stick

Tags

NGSS.MS-PS2-1

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

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

When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?

• The cannon moving forward
• The cannonball moving forward
• The cannon moving backward
• The cannonball moving backward

Tags

NGSS.MS-PS2-1

How much force is applied to Ben's hand if he hits the wall with a force of 1,000 N?

• 500 N
• 1,000 N
• 2,000 N
• Not possible to determine.

Tags

NGSS.MS-PS2-1

According to Newton's 3rd Law, an action and reaction are equal in____.

• size
• shape
• weight

Tags

NGSS.MS-PS2-1

Relating to Newton’s Third Law, action and reaction, what is the reaction when a rocket expels gas, smoke and flames from the nozzle end of the rocket engine?

• Nothing
• Propels in the opposite direction
• Creates a balanced force
• Creates friction

Tags

NGSS.MS-PS2-1

What is the reaction force to a foot pushing down on the floor?

• The foot going through the floor
• The floor pushing back against the foot
• The floor breaking to the foot

Tags

NGSS.MS-PS2-1