HARD
10th ICSE
IMPORTANT
Earn 100

Define one kilowatt-hour. Find its relation with joule.

Important Questions on Work, Energy and Power

HARD
10th ICSE
IMPORTANT
A load of 1000 kgf is to be moved on an inclined plane of length 10 m. If the angle of inclination of the plane with the horizontal is 30°. Calculate the work done against the gravity. (g=10ms-2)
HARD
10th ICSE
IMPORTANT

A body of mass 5 kg is pulled from point A to B on an inclined plane ABC. A force of 30 N is applied along the surface AB. Calculate,

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(i) the work done by the force in pulling the body.

(ii) the work done against the force due to gravity [g=9.8 ms-2]

(iii) explain the reason for the difference in two works done.

HARD
10th ICSE
IMPORTANT
A man runs 50m on horizontal road, then 5 m on an inclined road (inclination 3 in 4). Weight of man is 60 kgf. Calculate total work done by him(Neglect friction).
HARD
10th ICSE
IMPORTANT
An overhead water tank of capacity 1000 litres in 30 m above the ground. Calculate total work done in filling this tank. Calculate total time taken by a lift pump of power 5kW to fill the tank.
HARD
10th ICSE
IMPORTANT
A steamer boat of 100 HP can move in sea with maximum velocity of 3.43 m/s. Calculate frictional force applied by water on boat.
HARD
10th ICSE
IMPORTANT
A power lifter lifts a load of 180 kgf up to height of 2.2 m for 5s. Calculate (i) the work done (ii) power developed by him.
MEDIUM
10th ICSE
IMPORTANT
Define energy. How it is different from work ?
HARD
10th ICSE
IMPORTANT
Name the unit to express the energy of nuclear particles. How is this unit related to joule?