Question

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Read the passage and answer the following 4 questions:
on physics, work is the energy transferred to or from an object via the application of force
along a displacement. In its simplest forry, it is often represented as the product
of force and displacement. A force is said to do positive work if (when applied) it has a
component in the direction of the displacement of the point of application. A force does
negative work if it has a component opposite to the direction of the displacement at the point
of application of the force.
(i) When work is done on a body:
(a) it gains energy
(b) it loses energy
(c) its energy remains constant
(d) none of these
Work done upon a body is:
(a) a vector quantity
(b) a scalar quantity
(C) (A) and (B) both are correct
(d) none of these
(iii) Work done:
(a) is always positive
(b) is always negative
(c) can be positive, negative or zero (d) none of these
(iv) No work is done when:
(a) a nail is plugged in a wooden board (b) a box is pushed along a horizontal floor
(C) there is no component of force parallel to the direction of motion
(d) there is no component of force perpendicular to the direction of motion
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Answer 1

Answer:

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