Physics GK · all questions

Work, Energy and Power
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Q321

Potential energy = ?

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Q322

During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in

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Q323

An object was thrown vertically upwards and it reached a maximum height 'h' from the ground. While going over it, the object at

\frac{1}{4}

of height 'h' will have . . . . . . . .

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Q324

If an object with a mass of 25 kg is moving with the same acceleration as 8ms^-2, then the force exerted by the object is . . . . . . . .

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Q325

Which energy is in the water stored in the dam?

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Q326

An object of 20 kg is raised through a height of 2m, what will be the work done by the force of gravity on the object?

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Q327

An object moving with the uniform velocity of 4m/s has a kinetic energy of 120J. Find the mass of the object?

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Q328

What is the kinetic energy of a bullet when a bullet is fired from a gun?

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Q329

A block of 2 kg slides on a parallel surface at a speed of 4 m/s. It falls on an uncompress spring and presses it until the block becomes completely motionless. The value of kinetic friction is 15N and the spring constant is 10000N/m. spring presses-

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Q330

A car running at high speed, which energy does it contains?

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Q331

Direct conversion of solar energy with the use of a photovoltaic cell result in the production of

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Q332

A porter raise 12 kg object from surface of earth and put object 1.5 meter above from surface on his head. Calculate the work done on object (g = 10 ms^-2).

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Q333

When a person walks 4 meters with a constant force of 12N, the work done by him is-

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Q334

Fill in the blank with the correct option. An object is thrown vertically upward during their rise up potential energy and kinetic energy is-

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Q335

When an object of 11kg is placed at a height of 8m from the ground, then how much energy it will contains?

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Q336

How is the kinetic energy of a moving object affected if the net work done on it is positive?

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Q337

A force of 20 N is applied to an object and it accelerates with an acceleration of 2 m/sec². Calculate the mass of the object.

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Q338

An object with a mass of 100 kg is accelerated uniformly with a velocity of 5 ms^-1 to 17 ms^-1 in 6s. The magnitude of the force exerted on an object is . . . . . . . .

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Q339

The work is product of-

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Q340

The effect of stress depends on which of the following?

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