2.will it be possible for a girl in a see saw to balance herself with her father who weighs 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 seat 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 machine?

A. lever and a wedge

B. A wedge and a screw

C. a lever and a inclined plane

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

C. inclined plane

D. wheel and axle


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