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Work, Power & Energy – 1 – 1

1. Work is said to be done when a body is moved or stopped through certain distance by the action of :

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

Explanation
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2. When work is done _______ is transferred to the body or taken out of the body :

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

Explanation
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3. Work is a product of :

(a) Power and time
(b) Energy and displacement
(c) Force and energy
(d) Force and distance

Explanation
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4. In the vector form, the work done is :

(a) f x d
(b) d x f
(c) ½ f x d
(d) f . d

Explanation
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5. For certain values of F and d, work done is zero when the angle between the force and displacement is :

(a) 0o
(b) 30o
(c) 90o
(d) 180o