Third Law

What is an example of Newton's 3rd law

• A rainbow in the sky

• A rocket taking off

• A kid going to bed

• A ball in the air

Tags

NGSS.MS-PS2-1

A book rests on a table. The force of gravity pulls down on the book with a force of 20N. What prevents the book from falling down into the ground?

• The table and the book are pushing back with an acceleration of 9.8m/s².

• The table pushes back up on the book with a force greater than 20N

• The inertia of the book is equal to the inertia of gravity

• The table pushes back up on the book with an equal and opposite force of 20N

Tags

NGSS.MS-PS2-2

A bus hits a bug and the bug splatters on the windshield, which force is greater?

• The Bus

• The Bug

• They're the same

• Gravity acting on the bus

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a person pushes against the ground with their foot, the equal and opposite reaction force is

• when they start to move forward

• the ground pushing back on their foot

Tags

NGSS.MS-PS2-1

Newton's 3rd law says that for every action, there is an ______ reaction.

• unequal & opposite

• equal & similar

• equal & opposite

• stronger & opposite

Tags

NGSS.MS-PS2-1

When a cannon fires a cannonball, we can observe Newton's 3rd Law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backward

• The cannonball moving backward

• The cannonball moving forward

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?

• 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.

• For every action there is an equal and opposite reaction.

Tags

NGSS.MS-PS2-1

What is the action in the picture?

• The man pushing against the wall

• The wall pushing back at the man

• The ground pushing against the man's foot

Tags

NGSS.MS-PS2-1

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

• True

• False

Tags

NGSS.MS-PS2-1

When a heavy football player and a light football player run into each other, who exerts more force?

• The heavy one

• The light one

• They both exert an equal amount of force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2