Page 238 - New Medley 5 Semester 2

 A pulley makes our work easier by changing the direction of force.
 An inclined plane has a flat surface which is higher at one end than the other.

REMEMBER THESE TERMS

Force : A push or pull

Machine : A device used to do a work
Lever : A rigid rod which can be turned about a fixed point
Inclined plane : A sloping surface

Fulcrum : The fixed point around which a lever is turned

Check Your Study

A. Tick () the correct answers.

1. e upward force acting on an object oating in water is called
(a) Muscular force (b) Buoyant force

(c) Mechanical force (d) Gravitational force

2. A pulley is used to

(a) Join two surfaces (b) Dig soil

(c) Turning the car (d) Hoist the ag

3. Egg beater is an example of
(a) Wedge (b) Wheel and axle

(c) Screw (d) Lever

4. is is an inclined plane wrapped around a rod.

(a) Screw (b) Nail

(c) Wedge (d) Axe

B. Write True or False.
1. A lever is a complex machine.

2. When the load is in between fulcrum and e ort, the lever
is of second class.

3. A ramp is an example of a lever.

4. A pulley is a small wheel, with a groove around it.

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