Simple Machines

1. Which is an example of how a simple machine changes the direction of a force?

• Using a rope to pull a box up a hill

• Using a rope and pulley to raise a flag

• Using a slide to push a box down

• Using an axle and wheel to make a wagon move forward

2. What causes the efficiency of a machine to be less than 100%?

• Friction

• Input Force

• Gravity

• Reaction Force

3. Which of the following is a form of the inclined plane?

• Pulley

• Screw

• Wheel and axle

• Lever

4. Which simple machine would most likely increase the distance and reduce the force needed for a rolling cart to be moved up three steps?

• Lever

• Screw

• Pulley

• Inclined plane

5. The mechanical advantage available from a pulley could best help in which situation?

• Pushing a car

• Rotating a wheel

• Flying an airplane

• Lifting an elevator

6. An axe is an example of a



• Pulley

• Screw

• Inclined plane

• Wedge

7. A seesaw is an example of a

• Wedge

• Inclined plane

• Lever

• Pulley

8. The fixed point on a lever is called

• Load

• Bar

• Resistance

• Fulcrum

9. When force is used to move an object across a distance, this is called..

• Effort

• Energy

• Load

• Work

10. Which of the following does a simple machine do?

• Allows the users to apply less force over a longer distaance

• Change the direction of the applied force

• Reduce the amount of force needed to do work

• All of the above