EXERCISE : CHAPTER 10

Simple Machine

The figure shows a tool used to crack a nut. This tool is a second class lever because

QUESTION 1

A. There is no load

B. The load is in the middle

C. The effort is in the middle

D. The fulcrum is in the middle

Which pair of devices does not use the principle of lever ?

QUESTION 2

A. Screw and ladder B. Fishing rods and pliers

C. Nutcracker and paper cutter

D. Wheel-barrow and bottle opener

Diagram 3 shows the process of pruning leaves. The tool used can be classified as a first class lever because

QUESTION 3

A. The load is between the fulcrum and the force

B. The fulcrum is between the load and the force C.

The force is between the load and the fulcrum

D. The load is the same position as the fulcrum

Diagram 4 shows a vegetable seller carrying two baskets, F and G. F has a mass of 40 kg and G has a mass of 60 kg. The distance between G and the seller is 1.0 m. What should be the distance between the seller and F in order to balance both the baskets?

QUESTION 4

A. 0.5 mB. 1.0 mC. 1.5 mD. 2.5 m

Diagram 5 shows a nail being pulled out using tools, P and Q. Which of the following statements is correct about the effort that was used?

QUESTION 5

A. P needs less effort than Q to pull out the nail

B. Q needs less effort than P to pull out the nail

C. The distance of the nail from the fulcrum does not influence the effort usedD. If the distance of effort is nearer to the fulcrum, the effort used will

decreased

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