I need help please

1). the wheelbarrow is a ____ class lever because the _____ is in the middle of the two other important points.

a. 1st; fulcrum
b. 2nd; effort
c. 2nd; load
d. 3rd; effort

2). on a seesaw, will it be possible for a girl to balance with her father who weighs twice as much as her? if yes, how? if no, why not?

a. No. she needs to be as heavy as her father.
b. No. She needs to be heavier than her father.
c. Yes. she will have to sit nearer the fulcrum than her father.
d. Yes. Her father will have to sit nearer the fulcrum than her

3). the can opener is a combination of what simple machines?

a. a lever a a wedge
b. a wedge and a screw
c. a lever and an inclined plane
d. a inclined plane and a wedge

4). in going up a less steep incline,_____ force is needed while going through a _____ distance

a. less; longer
b. less; shorter
c. more; longer
d. more; shorter

5). A screw is actually a special kind of ______

a. lever
b. wedge
c. inclined plane
d. wheel and axle

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