CHAPTER 10 SIMPLE MACHINESUBJECTIVE QUESTIONS10.1 Levers

1 State the type of lever according to the position of F, E and L.

2 Give an examples and the uses of following levers.

Lever Examples Uses(a) First class(b) Second class(c) Third class

3 State two factors that affect the turning effect of a force.(a) _____________________________________________(b) _____________________________________________

OBJECTIVE QUESTIONS10.1 Levers

1 Diagram 1 shows a tool.

Which of the following tools are in the same class lever as this tool?A Claw hammer C Ice tongsB Bottle opener D Broom

2 A wheelbarrow and X are in the same class levers. X probably is

A ice tongs C a nutcrackerB a pair of scissors D a pair of pliers

3 Which of the following is an example of a third class lever? A C

B D

4 Diagram 2 shows two types of levers.

Which of the following tools represent X and Y tools?

5 Diagram 3 shows a lever system.

What are the values of X and Y which enable the lever to balance?

6 Diagram 4 shows a class of lever.

Which of the following instruments apply the principle of this class of lever?A Bottle opener C Ice tongsB Wheelbarrow D Pliers

REVISION

1 Diagram 1 shows a bottle opener and fishing rod.

(a) Study the diagram above and label the fulcrum (F), effort (E) and load (L) in both X and Y.

(b) Name the class lever of X and Y.X : ____________ Y : _______________

(c) Give another example which is the same class as X and Y._________________________________________

_________________________________________(d) Based on the Diagram 1.1, calculate the efforts used to

balance the lever.