Force and Motion

1.       Gordon is making a list of forces for his science class. Which of the following should Gordon not list as a force?

• mass

• gravity

• friction

• push or pull

Luis rubbed a balloon on his hair and held the balloon next to the wall. He observed the balloon stick to the wall. Which of the following is responsible for the balloon sticking to the wall?

• friction

• gravity

• electric force

• magnetic force

Forces that act at a distance include electrical force and gravitational force.  What other type of force acts at a distance?

• friction

• conduction

• contact force

• magnetic force

Adam is studying forces in the lab. If he applies an unbalanced force to an object, what could happen?

• the objects speed can change

• only the objects direction can change

• the objects speed, direction or BOTH can change

• neither the objects speed or direction can change

Paula pushes a skateboard and it gradually slows to a stop. Why does the skateboard come to a stop?

• only gravity stops the skateboard

• friction and gravity stop the skateboard

• the skateboard has a positive acceleration

• Paula did not push the skateboard with enough force

Which of the following is the best example of kinetic energy being transformed into potential energy?

• rocks sliding down a mountain

• wind pushing a sailboast throught the water

• a boat pulling a water skier through the water

• water flowing into a lake behind a dam

What does the Law of Conservation of Energy State?

• energy cannot be created or destroyed

• energy cannot be transformed to another type

• energy can be created or destroyed

• energy can be created but not destroyed

A slingshot that has been pulled back, but has not been let go.

• Kinetic

• Potential

A sky diver is traveling at his fastest speed (terminal velocity) when falling.

• Kinetic

• Potential

At which point is potential energy greatest?

• W

• X

• Y

• Z