Learning Task 10:
A. Choose the letter of the correct answer. Write it on the blank.
1. The wheel barrow is a
class lever because the
is in the middle of the two other important points
a. 14, fulcrum
b. 2nd, load
c. 3rd, effort
d. 2e effort
2. Wil it be possible for a girl in a seesaw to balance herself with her father who weigh twice as much as her? Why?
a. Yes, she'll have to sit nearer the fulcrum than her father. c. No, she needs to be as heavy as her father.
b. Yes, her father will have to sit nearer the fulcrum than her. d. No, she needs to be heavier than her father
3. A can opener is a combination of which simple machine?
a. a lever and a wedge
c. a lever and an inclined plane
b. a wedge and a screw
d. an inclined plane and a wedge
4. How much force is needed in going up a less steep incline?
a. less, longer
b. less, shorter
c. more, shorter
d. more, longer
5. A screw is a special kind of what simple machine?
a lever
b. wedge
cinclined plane​