LMS

Work is __________ quantity

If F = 2i + 3j and d= 7k then amount of work done will be

The work done can also be calculated by the area under

A force F = 3i+2j+4k N gives displacement of 10j m. The work done is

If a mass of 5kg is lifted upto 5 m height then work done against gravity will be

Work done on a body equals to change in its

The relationship between force and position is shown in figure (in one dimensional case). The work done by the force in displacing a body from x = 1 cm to x = 5 cm is

A force of N gives displacement m work done is

If a body of weight w is lifted through a height ‘h’ from ground, then the work done by the gravity will be

Total work done in figure

A 1kg mass has a K.E of 1J when its speed is

If momentum is increased by two times K.E increases by

When work done by gravitational field is negative then P.E of the system.

A car accelerates up a hill what happens to its K.E and to its P.E respectivelyKinetic EnergyPotential EnergyIncreases       DecreasesDecreasesIncreasesIncreasesIncreasesUnchangedIncreases

A 2m tall man standing at a top of a 30m tall tower raises a 1kg mass 0.5m above his head. The potential energy of the raised mass may be consider to be

If a body raised up from the earth’s surface, the work done equal to change in the:

When we raise the body above the surface of the earth its P.E within the gravitational field.

Which of the following graphs is correct between kinetic energy (E), potential energy (U) and height (h) from the ground of the particle

The diagrams represent the potential energy U of a function of the inter-atomic distance r. Which diagram corresponds to stable molecules found in nature.

The graph between E and v is

How much water a pump of 2 kW can raise in one minute to a height of 10 m (Take g = 10 ms–2)

Power of 2238 watt in horse power is

The time taken by an engine of power 10 kW to lift a mass of 200 kg to the height of 40 m is

A horse pulls a wagon with a force of 360 N at an angle of 60° E with the horizontal at a speed of 10 km h–1. The power of the horse is

A motor drives a body along a straight line with a constant force. The power P developed by the motor must vary with time t according to

A bucket full of water having mass of 1000 kg is taken upto height of 10m in 10 seconds. What is the power developed?

One kilo watt hour is the amount of work done in

The dimension of power is

Slope of work time graph is equal to

Two men with weights in the ratio 5 : 3 run up a staircase (of same height) in times in the ratio 11 : 9. The ratio of power of first to that of second is:

A automobile travelling with a speed of 60 km h–1, can brake to stop within a distance of 20 m. If the car is going twice as fast i.e., 120 km h-1, the stopping distance will be

A force of 10N acts on a body at angle such that K.E of body increases to from . What is the work done by the force?

A body of mass 4kg is moving with a velocity of 4m/sec. How much force is required to stop the body with in a distance of one meter

A lorry and a car moving with same kinetic energy are brought to rest by the application of brakes which provide equal retarding force. Which of them comes to rest in shorter distance?

The actual efficiency of machine is

The effciency of patrol heat engine is

A machine needed 1000 J of energy to raise a 10 kg block at a distance of 6 m, the efficiency of machine is

The efficiency of ideal machine

If a machine moves a load W through a distance h then the useful work done by the machine is

Block and tackle system of pulleys is used to raise a load of 500N through a height of 20 m. The work done against friction is 2000J. Calculate the work done by the effort.

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Things ___on heating and contract on cooling.

The train __at seven twenty-three tomorrow morning.

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You ________ so kind to me.

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One day people ______ to Mars.

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You already _____ a lot for me.

Choose the correct option.I _______ really tired for a whole week now.

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I _________ late for work.

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You ________ a puppy, would you?

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I love this film. I think it’s the fourth time I _________ it.

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This year is the period which began in January and has __________up to the present time.

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He______ in hospital since his accident.

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I ______ a few days before she died.

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At 6 o’clock, I _______ dinner.

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He was busy packing, for he ________ that night.

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He ______ wait till we had finished our meal.

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It was only the second opera I _____ in my life.

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She ______ to telephone her mother all day.

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Spring ______ again.

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It’s no good, is it?

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I ______ an exam in the coming October.

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While I ____ for the bus, I'll drink my coffee.

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Don’t forget, _______.

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There is little we ______ about it, is there?

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After you _______ the police, what did you do?

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_________ six emails since lunchtime.

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I ______about you all day.

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Once upon a time a princess ____ in love with a farmer.

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Some people think that Shakespeare a lot in Germany.

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I ______ my new job tomorrow.

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There goes our bus daily.