Simple machine

1. The speed of sound in all medium depend on ________.

1) Air
2) Temperature
3) Density
4) All

2. Sound can not travel through _______.

1) Gas
2) Liquid
3) Solid
4) Vaccum

3. Which is not a example of simple machine ________.

1) Pully
2) Spring
3) Inclined plane
4) Screw

4. What type of simple machnie used to load vehicles on truck ?

1) Inclined plane
2) Iron pulley
3) Screw
4) Spring

5. What is to move any object ?

1) Simple machine
2) Force
3) Weight
4) None

6. Rod attached to the centre of a wheel is called _______.

1) An axle
2) A magnet
3) A wedge
4) Rod

7. A knife is an example of _________.

1) Screw
2) Pully
3) Wedge
4) None of these

8. Which is the example of complex machine ?

1) Wedge
2) Bicycle
3) Pully
4) Both 2 & 3

9. A fishing rod is an example of lever of _______.

1) Second order
2) First order
3) Third order
4) Second & third order

10. Which is not a example of complex machnie ?

1) Mixture
2) Sewing machine
3) Screw
4) Watch

11. Friction is present in moving ball whenever surface _________ to the ball.

1) Break
2) Touch
3) None
4) Smooth

12. Which is simple machine ?

1) Nail cutter
2) Bottle opener
3) Wheel
4) All

13. Which is complex machine ?

1) Mixer
2) All
3) Scooter
4) Bicycle

14. Who am I ?
I am slanling plank useful to lift a weight.

1) None
2) Inclined plane
3) Stair
4) Pulley

15. Which is not example of inclined plane ?

1) Bottle opener
2) Slanting plank
3) Screw
4) Winding road

16. What is invented by greek scientist Archimedes ?

1) Archimede's screw
2) Archimede's pipe
3) Water
4) Archimede's pully

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