Question # 1

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

The tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

The unit of energy is same as that of

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Power

Work

Torque

Density

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

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