Newtons laws

A dictionary weighing 15 Newtons is placed on a desk.

What is the force that the desk exerts on the dictionary?

• none

• 15 N

• 1.5 N

• 150 N

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

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

The rocket engines ignite and push the gases downward, what is the movement of the rocket?

• The rocket moves upward

• Mass of the rocket decreases

• The gases cause a reduction in air resistance

• The rocket moves downward

How will this object move? 

• It won't move. 
• It will move to the right. 
• It will move to the left. 
• It will move in both directions. 

When the teacher rearranges the desks in the classroom, she must apply ____________ to push and pull the desks around.

• acceleration

• force

• weight

• magnets

If an object is at rest, then there are no forces acting upon the object.

• True

• False

A person is pushed forward into their seatbelt when a car stops

• 1st
•  2nd
• 2 and 3
• 3rd 

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, opposite direction

• 200 Newtons, same direction

A more massive object has more inertia than a less massive object.

• True

• False

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.