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Physics Class 9 - Important MCQs - 9

Physics Class 9 - Important MCQs - 9

1. Egyptian pyramids

1) Lever
2) Inclined plane
3) mg
4) Screw jack
2. Rotation of the particles

1) Fixed circles
2) Meter
3) right hand rule
4) Centre of gravity
3. Rotation of wheel

1) Unlike parallel forces
2) Frame of reference
3) Torque
4) 3
4. Change direction of force

1) Nut
2) Machine
3) Rotated Point
4) L
5. gh

1) Global satellites
2) GM/(R+h)2
3) Newton
4) circular motion
6. Plumb line

1) Centre of sphere
2) ?F=0
3) Centre of gravity
4) Equilibrium
7. Mechanical Advantag

1) Moment of Load
2) Load effort
3) opening bottle
4) Exd
8. Torque

1) Force
2) Central point of axis
3) F x r
4) Force of gravity
9. Artificial Satellite

1) Centrifuge
2) Centrifugal force
3) telecommunication
4) To avoid accident
10. Load

1) M.A=1
2) L
3) Nut
4) Rotated Point
11. Centre of gravity of cylinder

1) Central point of axis
2) Force
3) Force of gravity
4) Torque
12. Motion of blades of electric fan

1) 6.67x10-11 Nm2/kg2
2) 6x1024 kg
3) v 6.67x10-11 Nm2/kg2/ r
4) circular motion
13. Mass of earth

1) 9.8 m/s2
2) 6x1024 kg
3) 7.9 km/sec
4) 5500 kg /m3
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