Newton's 3rd Law

An object of mass m sits on a flat table. The Earth pulls on this object with force mg, which we will call the action force. What is the reaction force?

• The table pushing up on the object with force mg

• The object pushing down on the table with force mg

• The table pushing down on the floor with force mg

• The object pulling upward on the Earth with force mg

Tags

NGSS.HS-PS2-1

A 20-ton truck collides with a 1500 lb car and causes a lot of damage to the car. Since a lot of damage is done on the car:

• the force on the truck is greater than the force on the car

• the force on the truck is equal to the force on the car

• the force on the truck is smaller than the force on the car

• the truck did not slow down during the collision

Tags

NGSS.HS-PS2-1

As you are sitting in a chair, you feel the chair is pushing up on your. The reaction force in this situation is:

• The chair pushing down on the ground

• Gravity pulling down on you

• You pushing down on the chair

• The ground pushing up on the chair

Tags

NGSS.MS-PS2-4

A student is doing a handstand. A reaction pair of forces is best described as:

• The student pushes down on the ground; The ground pushes up on the student

• Gravity is pulling the student down; The ground is pushing the student up

• Gravity is pulling the student down; The student's arms push the student up

• The student's hands push down on the ground; The students arms push the student up

Tags

NGSS.HS-PS2-1

Which of Newton's Laws best explains why motorists should wear seat belts?

• the first law

• the second law

• the third law

• the law of gravitation

Tags

NGSS.HS-PS2-3

If you blow up a balloon, and then release it, the balloon will fly away. This is an illustration of: (PICK THE BEST ANSWER)

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd

• Law of Gravitation