Physics GK · all questions

Work, Energy and Power
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Q181

Which of the following contains potential energy?

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Q182

Work known as-

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Q183

What is the formula for finding the kinetic energy of an object?

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Q184

What is the kinetic energy of a ball of mass 2kg moving at a speed of 30ms^-1?

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Q185

If the kinetic energy of an object becomes 256 times that of its initial value, then the new linear momentum will be?

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Q186

Which type of energy is there in a stretched rubber band?

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Q187

If the velocity of an object is twice that of its initial velocity, how many times will its kinetic energy increase?

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Q188

When a repulsive force 'F' is applied in the opposite direction, the angle between the two directions will be-

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Q189

The energy possessed by a body due to its change in position or shape is called-

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Q190

A more powerful engine can do more work in less time like an aeroplane travel more distance as compare to a car in less time. So aeroplane is more powerful than a car. It is an example of which of the following ?

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Q191

Assertion (A): A man standing on a completely frictionless surface can propel himself by whistling.
Reason (R): If no external force acts on a system, its momentum cannot change.

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Q192

Which of the following objects will have potential energy?

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Q193

What will be the value of the kinetic energy of an object moving along the mass of 'm' if its speed is changed from 'v' to '2v' ?

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Q194

If force (F) and acceleration (a) are given, then the formula for finding the mass (m) of an object is . . . . . . . .

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Q195

A moving car faces the wind in the opposite direction. What will be the work done by the wind on the car?

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Q196

What is the change in the total energy of a body falling freely towards the earth?

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Q197

Work can only be done when . . . . . . . . is present.

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Q198

The kinetic energy of an object of mass 10kg moving at a speed of 6ms^-1 is-

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Q199

When you stretched a rubber band, the energy stored in it?

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Q200

A boy raises a box with a weight of 120 N through a height of 2 m. The work done by the boy is-

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