Question

If the kinetic energy of a body of mass 15 kg is 30J,find its momentum.

Answer 1

Heya........!!!


We know the relation between Kinetic energy and Momentum i.e
Kinetic energy =>> 30 J
Mass = 15Kg
Hence ,
$k = \frac{p {}^{2} }{2m} \\ \\ 30 = \frac{p {}^{2} }{2 \times 15} \\ \\ p = \sqrt{30 \times 30} \\ p = 30$
Momentum ( p ) = 30 Kgm/s


Hope it helps u

Answer 2

Hey!

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We know,
k= p^2/2m

Given,

Mass = 15 kg
Kinetic energy = 30 J
Momentum =?

Using the relation,

30 = p^2 / 2×15
30 = p^2 / 30
30×30= p^2
900 = p^2
p = √900
p= 30 kg m/s

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Hope it helps...!!!