Question 1

The wheelbarrow is a ______class lever because the _______is in the middle of the two other important points.

Accepted Answer

2nd; load

Answer

3rd; effort

Answer

2nd; effort

Answer

1s; fulcrum

Question 2

Will it be possible in a girl in a seesaw to balance herself with her father who weighs twice as much as her? Why?

Accepted Answer

Yes. Her father will l have to sit nearer the fulcrum than her

Answer

Yes. She’ll have to sit near the fulcrum than her father

Answer

No. She needs to be as heavy as her father

Answer

No, She needs to be heavier than her father

Question 3

A can opener is a combination of which simple machine?

Accepted Answer

a lever and a wedge

Answer

an inclined plane and a wedge

Answer

a wedge and a screw

Answer

a lever and an inclined plane

Question 4

How much force is needed in going up a less steep incline?

Accepted Answer

less; longer

Answer

more ; longer

Answer

less; shorter

Answer

more; shorter

Question 5

A screw is a special kind of what simple machine?

Accepted Answer

inclined plane

Answer

wheel and axle

Answer

lever

Answer

wedge

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