Forces and Motion Test

A V-shaped simple machine made up of two inclined planes is a

• pulley

• lever

• screw

• wedge

The GREATEST force is needed to move a box that weighs

• 100 pounds

• 75 pounds

• 2 pounds

• 150 pounds

Tom and Debbie are riding their bicycles. Debbie is riding behind Tom. If both increase the force to the pedals by pedaling faster with the same increase in speed, which do you predict will happen?

• More air resistance will cause them to slow down

• The velocity of both Tom and Debbie will increase

• The force of gravity on the bikes will increase

• Debbie will catch up with Tom

You and a classmate roll different sized balls using different amounts of force. Which should you do to make sure the report of your investigation is correct?

• Write down only the observations that make sense.

• Write down your observations as you carry out the investigation. Then change your data to match your prediction/hypothesis.

• Write down your observations only after you complete the investigation.

• Write down your observations as you carry out the investigation. The use the data to write the report.

Which BEST describes the data in the table?

• Car 2 travels faster.

• Car 2 travels at 75 miles per hour

• Car 1 travels at 75 miles per hour

• Both cars travel at the same speed.

What is the force that keeps a book falling after it is released?

• friction

• gravity

• speed

• velocity

A simple machine makes it easier to do work on an object because it

• reduces the weight of the object that is moved

• decreases the force of gravity on an object

• uses many parts to increase force on an object

• decreases the force needed to move an object

Which is NOT an example of the effect of gravity?

• rivers flowing downhill

• the Moon orbiting Earth

• a ball switching direction when hit

• a basketball falling through a hoop

Ben wants to open a lid with the least effort. Which should he use as a lever?

• clothesline pulley

• doorknob

• screwdriver

• wood screw

An inclined plane makes it easier to move an object by changing

• a weak force to a strong force

• the direction of the force

• the distance over which the object moves

• a downward force to an outward force