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Physics Class 9 - Important MCQs - 13

Physics Class 9 - Important MCQs - 13

1. Machine

1) Doing Work
2) Load effort
3) Out Put / In put
4) Output
2. States of equilibrium

1) Positive torque
2) Neutral equilibrium
3) 3
4) Unstable equilibrium
3. Axle

1) r
2) pulley
3) lever
4) Wheel & Axle
4. Sin 60o

1) Doing Work
2) 0.866
3) 0.5
4) zero
5. Ideal machines

1) Nut
2) L
3) 100% Efficiency
4) Machine
6. Height of gravity not change

1) Newton meter
2) Neutral equilibrium
3) directed towards center
4) Positive torque
7. Lever

1) Pulley
2) Moment of Load
3) opening bottle
4) 2
8. Gravitational constant

1) 5500 kg /m3
2) 9.8 m/s2
3) 6.67x10-11 Nm2/kg2
4) 6x1024 kg
9. Kilo

1) 10-6
2) 10-9
3) 103
4) 10-3
10. MA of pulley

1) Screw Jack
2) 2
3) r
4) 1/sin?
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