Work, Power & Energy – 1 – 2

6. Work done is maximum when force is _______ to displacement.

(a) Equal
(b) Perpendicular
(c) Opposite
(d) Parallel

ANSWER

EXPLANATION

7. The units of work are the same as those of :

(a) Power
(b) Energy
(c) Force
(d) Mass

ANSWER

EXPLANATION

8. The rate of doing work is called :

(a) Energy
(b) Power
(c) Force
(d) Inertia

ANSWER

EXPLANATION

9. The SI unit of power is :

(a) Joule
(b) Erg
(c) Dyne
(d) Watt

ANSWER

EXPLANATION

10. In the vector form power is expressed as :

(a) P = F . V
(b) P = F x V
(c) P = V x F
(d) P = F . d

ANSWER

EXPLANATION

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