Question

What is the momentum of body of mass 2kg having kinetic energy 20joule

Answer 1

Answer:

KE=1/2mv^2

m=2kg

v=?

KE=20j

20=1/2×2×v^2

v^2=40

v=2√5m/s

Momentum=m×v

Momentum=2×2√5

Momentum=4√5kgm/s

Explanation:

Answer 2

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ANSWER :

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The mass of the object, m = 2 kg

The momentum of the object, p = ?

The Kinetic Energy, K.E = 20 J

We know that,,,

$kinetic\: energy \: = \frac{p {}^{2} }{2m}$

From this,,,,

20 = p^2 / 2 × 2

20 = p^2 / 4

p^2 = 20 ×4

p^2 = 4 × (5)1/2

The momentum, p is 4 (5) 1/2 Kg m/s

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