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Physics Class 9 - Important MCQs - 16

Physics Class 9 - Important MCQs - 16

1. Radius of earth

1) circular motion
2) Global Satellites
3) 4/3 Pi R3
4) 6.4x 106m
2. Anti clock wise torque

1) Positive torque
2) directed towards center
3) Newton meter
4) Newton
3. Acceleration due to gravity

1) 9.8 m/s2
2) ma
3) Mountains
4) 7.9 km/sec
4. Human Arm

1) Inclined plane
2) Lever
3) mg
4) R
5. Death Well

1) Mv2/r
2) 6.4x 106m
3) Centrifugal force
4) Global Satellites
6. Couple

1) Equal ? apposite parallel forces
2) Central point of axis
3) F x r
4) Force of gravity
7. Draw water

1) Wheel & Axle
2) pulley
3) 100% Efficiency
4) Machine
8. Centi

1) ma
2) Fxs
3) 10-3
4) mv-2
9. Moment arm

1) Meter
2) Centre of gravity
3) Equilibrium
4) Centre of sphere
10. Displacement

1) Newton
2) Meter
3) Joule
4) 10^6
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