Question
Differentiate between work and power.

Answer

Work Power
1. Work done by a force is equal to the product of force and the displacement in the direction of force. 1. Power of a source is the rate of doing work by it.
2. Work done does not depend on time. 2. 2. Power spent depends on the time in which work is done.
3. S.I unit of work is joule (J). 4. S.I unit of power is watt (W).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A box of weight $150$ kgf has gravitational potential energy stored in it equal to $14700 J$. Find the height of the box above the ground. (Take $g = 9.8 N kg^{-1})$
Three forces A, B and C are acting on a rigid body which can turn about O in fig.9. If all the three forces are applied simultaneously, in which direction will the body move? Explain.
Name the three constituent of an atom and state their mass and charge of each. How are they distributed in an atom?
A piece of stone tied at the end of a thread is whirled in a horizontal circle. Name the force which provides the centripetal force.
  1. Is the velocity of stone uniform or variable?
  2. Is the acceleration of stone uniform or variable?
  3. What is the direction of acceleration of stone at any instant?
  4. What force does provide the centripetal force required for circular motion?
  5. Name the force and its direction which acts on the hand.
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions. State the kind of lever. Calculate: (1) load arm, (2) effort arm, (3) mechanical advantage and (4) the effort needed.
How is it possible to detect the filling of a pitcher under a tap by hearing its sound at a distance?
Point out two main disadvantages of ‘Tree System’.
A concave mirror and convex lens are held in water. What changes, if any, do you expect in their focal length?
What is meant by ‘MCB’? Which part of the domestic electric circuit does it replace?
A wheel of diameter2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about Centre O and point A.