Newton's Laws and Forces

This force pushes against gravity when you sit in a chair

• normal

• gravity

• tension

• friction

This force pulls you down when you sit in a chair

• normal

• gravity

• tension

• friction

This force pulls up against gravity when a box is hanging from a rope

• normal

• gravity

• tension

• friction

This force fights against motion

• normal

• gravity

• tension

• friction

What is the net force on the block?

• balanced, the net force is 0

• unbalanced, the net force is 5 N up

• unbalanced, the net force is 5 N down

• Unbalanced, the net force is 5 N sideways

What is the net force on the cart?

• balanced, the net force is 0

• unbalanced, the net force is 50 N up

• unbalanced, the net force is 50 N left

• Unbalanced, the net force is 50 N right

After you kick a ball, this is what keeps it moving forward

• applied force

• gravity

• nothing

• tension force

If the car you are in hits a wall, you will hit the front of the car. What causes this?

• Inertia

• applied force

• gravity

• tension force

When your car is full of your friends, it accelerates more slowly. Which of Newton's Laws best explains this?

• inertia, 1st Law

• F=ma, 2nd Law

• applied force, 4th Law

• Equal and opposite reactions, 3rd Law

You push backwards on the Earth. What is the reaction?

• The Earth pushes forward on you

• You move

• The Earth pushes up on you

• Gravity pulls you down