Advertisements
Advertisements
प्रश्न
A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.
(i) Calculate the work done by force in moving the block from A to B.
(ii) Calculate P.E. gained by block. [g=10ms-2]
Advertisements
उत्तर
(i) Work done in moving the block from = F × d
A to B = 200 N × 3m = 600 J
(ii) Gain in potential energy = mgh = 30 × 10 × 1.5 = 450 J.
संबंधित प्रश्न
An electron emitter must have _____________ work function and ___________ melting point.
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
What are the units of (a) work, and (b) energy?
Name five appliances or machines which use an electric motor.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?
A bucketful of water is to be drawn from a well ______ will be done when a ______ is applied to do this because there will be a ______ of water.
(displacement, work, force)
A is a push or a pull ______.
