Physics
Match the following:
| Column A | Column B |
|---|---|
| (a) A stone at a height | (i) power |
| (b) A moving ball | (ii) joule |
| (c) Energy | (iii) work done in 1 sec |
| (d) Power | (iv) potential energy |
| (e) watt | (v) kinetic energy |
Work, Energy & Power
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Answer
| Column A | Column B |
|---|---|
| (a) A stone at a height | (iv) Potential energy |
| (b) A moving ball | (v) Kinetic energy |
| (c) Energy | (ii) joule |
| (d) Power | (iii) work done in 1 sec |
| (e) watt | (i) power |
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Related Questions
Fill in the blanks:
(a) Work is said to be done by a force only when …………… .
(b) Work done = Force x …………… .
(c) The energy of a body is its capacity to do …………… .
(d) The S.I. unit of energy is …………… .
(e) The potential energy of a body is due to its …………… and kinetic energy of a body is due to its …………… .
(f) Gravitational potential energy U = mass x force of gravity on unit mass x …………… .
(g) Kinetic energy = x mass x …………… .
(h) Power P = …………… / time taken.
(i) The S.I. unit of power is …………… .
(j) 1 H.P. = …………… W.
Write true or false for each statement:
(a) A coolie does no work against the force of gravity while carrying a luggage on a plane road.
(b) The energy stored in water of a dam is kinetic energy.
(c) The energy of a flying kite is kinetic energy.
(d) Work done by a boy depends on the time in which he does work.
(e) Power spent by a body depends on the time for which it does work.
Define work.
When does a force perform work?