RRB Group D 10-Oct-2018 Shift 2 Solved Paper

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Question : 23 of 100

Marks: +1, -0

An object of mass

11 \ { kg}

is moving with a uniform velocity of

5 \ { ms}^{-1}

. What is the kinetic energy possessed by the object?

$180.5 \ { J}$
$137.5 \ { J}$
$137.5 \ { ms}$
$17.5 \ { J}$

Solution:

Given, mass

-11 \ { kg},

velocity

-5 \ { m} \/ {sec},

\ {KE}-?

We know that-

\ {KE}=1 / 2 \ {mv}^{2}=1 / 2 × 11 \×(5)^{2}

=137.5 \ { J}

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