Physics GK · all questions

Work, Energy and Power
practice.

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Q241

If the number representing volume and surface area of a cube are equal, then the length of the edge of the cube in terms of the unit of measurement will be

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Q242

A dynamo is used to convert

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Q243

An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil, then

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Q244

What will be the momentum of an object of mass

\frac{m}{2}

and whose velocity is 2v?

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Q245

When an object of 15 kg is at a height of 10 m from the ground, then find the energy contained in it ? (g = 10ms^-2)

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Q246

If the air resistance is negligible, then what will be sum of the potential energy and kinetic energy of the freely falling object.

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Q247

The ability of an object to do the work energy contained in an object is depend on the-

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Q248

When an object of 11 kg is at a height of 5 m from the ground, then find the energy contained in it? (g = 9.8ms^-2)

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Q249

A worker takes 10 kg of goods from the ground and puts it on 1.1m above the land on his head. What will be the work done by the worker.

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Q250

A 40 gm bullet is fired horizontally from a gun of mass 3 kg has velocity of 180 m/s. Find the recoil velocity of gun?

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Q251

The force of 25 N is working on an object, that object is moved in the direction of force by 5 m, the work done by the force is:

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Q252

What is working rate or energy transfer rate?

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Q253

As the train starts moving, the head of the passenger sitting inside leans backward because of

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Q254

If the velocity is doubled, then

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Q255

The bullet fired from the gun goes deep inside the target because it has-

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Q256

Following given example represent-
1. A high speed pebble can hurt a person or break a window glass.
2. Energy of a moving vehicle
3. Fast moving air can damage many homes
4. Wind can drive the wind mill

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Q257

When an object of 11kg is placed at a height of 7m from the ground, how much energy it will contained?

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Q258

Which one of the following statements about energy is correct?

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Q259

An object of 1 kg, raised 10m above the surface of earth then work done by gravitational force will- (g = 9.8 m/s²)

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Q260

How is power interpreted?

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