Unit 3- Newton's 3rd Law, Momentum, and Impulse

1. Whenever an object exerts a force on another object, the second object exerts a force of _________ magnitude, and in the ____________ direction to that of the first object.

• 1. equal, opposite

• 1. different, same

• 1. different, opposite

• 1. equal, same

You hit a nail with a hammer. There is a force...

• on the hammer but not the nail

• on the nail but not the hammer

• on the nail and hammer

• There are no forces

Forces occur in

• Single

• Only when there is no velocity

• Triplets

• Pairs

In the equation Ft = mΔv, “mΔv” represents:

• Impulse
• Change in momentum
  
• Impact
• Time of impact

In the equation Ft = mΔv, “t” represents:

• Impulse
• Change in momentum
  
• Impact
• Time of impact

Which has more momentum, a large truck moving at 30 mph or a small car moving at 30 mph?

• They're both the same.
• The small car.
• The large truck.
• Not enough information.

A speeding bus makes contact with a bug that splatters onto the windshield.  What is the size of the corresponding force that the bug exerts against the windshield?  The force the bug exerts on the windshield is __________________- the force the windshield exerts on the bug.

• greater than
• less than
• equal to

Which of the following has the most momentum?

• A semi-truck parked in a parking lot
• An empty building
• A tightrope walker crossing Niagara falls
• A pickup truck traveling down the highway at the speed limit

During our Egg Drop lab, what variable did we try to change in our impulse equation?

• Force (F)

• Contact/Stopping Time (t)

• mass (m)

• Change in velocity (△v)

A cannon shoots a cannon ball. Which experiences the greater impulse?

• Cannon

• Cannon Ball

• They both experience the same impulse