Choose the letter of the correct answer. Write your answers on a separate sheet of paper.

1. How can a pulley reduce the effort force needed to lift a heavy object?
A. The effort force moves opposite to the distance the weight moves.
B. The effort force moves relative to the distance the weight moves.
C. A pulley can reduce the effort force by increasing the length of the rope
D. A pulley can reduce the effort force by changing the direction of the force.

2. On a seesaw, will it be possible for a boy to balance with his father who weighs twice as much as his? If yes, how? If no, why not?
A. Yes. He will have to sit nearer the fulcrum than his father.
B. Yes. His father will have to sit nearer the fulcrum than him.
C. No. He needs to be as heavy as his father.
D. No. He needs to be heavier than his father.

3. It is a pulley that is used to lift a heavy weight with less force.
A. single pulley
B. fixed pulley
C. movable pulley
D. block and tackle pulley

4. How does an inclined plane help us do our work easier?
A. It can hold things together.
B. We can cut or divide things easily.
C. It can move heavy loads to a greater height
D. We can do the same amount of force with less effort.

5. Which of the following simple machines is used for lifting heavy objects and hold two pieces together?
A. lever B. pulley C. screw D. wedge

6. Which is NOT a simple machine?
A. screw B. lever C. pulley D. fulcrum

7. Which of the following is a sloping surface that reduces the amount of force required to move an object?
A. wedge B. lever C. pulley D. inclined plan

8. Which is NOT true about wedges?
A. It is a simple machine.
B. It cuts or splits an object apart.
C. It has a fixed point called fulcrum.
D. It is made up of two inclined planes.

9. Which of the following statements about screw is TRUE?
A. Screws are made of wood.
B. All screws have the same size.
C. Screws do not require a thread.
D. Screws move objects to a greater depth by applying the force.

10. Why do we not just remove the wheel and turn the axle?
A. The wheel balances the axle.
B. The axle cannot turn on its own.
C. Without the wheel, the axle is useless. D. Turning the axle directly requires too much effort.​