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Q.

The Kinetic Energy acquired by mass ‘m’ in travelling a certain distance ‘d’, starting from rest, under the action of a constant force is

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a

directly proportional tom

b

Independent of m

c

directly proportional to1m

d

directly proportional to m

answer is B.

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Detailed Solution

A body of mass m is acted upon by a constant force F & moved through a distance d

So work done = F×S = change in K.E.

w=F×d = kinetic energy acquired relative to its initial K.E

ΔK.E=Fd

In this situation we can claim that ΔK.E depend only on F, d and ΔK.E has no dependence on mass m because everybody irrespect of mass get some change in K.E upon displaced through a distance d by the application of force F.

Option (b) is correct conclusion.

Apart from other options a, c, d.

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