Choose the best answer. Write the letter of your answer on the space provided before each

number
1. The wheel barrow is a
class lever because the
is in the middle of
the two other important points.
a. 1st, fulcrum
c. 3rd, effort
b. 2nd, load
d. 2nd effort
2. Will it be possible for a girl in a seesaw to balance herself with her father who weights
twice as much as her? Why?
a. Yes. She'll have to sit nearer the fulcrum than her father.
b. Yes. Her father will have to sit nearer the fulcrum than her.
c. No. She needs to be as heavy as her father
d. No. She needs to be heavier than her father.
3. A can opener is a combination of which simple machines?
a. A lever and a wedge
b. A wedge and a screw
c. A lever and an inclined plane
d. An inclined plane and a wedge
4. How much force is needed in going up less a less steep incline?
a. less, longer
c. more; shorter
b. less, shorter
d. more; longer
5. A screw is a special kind of what simple machine?
b. wedge
c. inclined plane
d wheel &axle
a. lever
1​