Question

A coin of mass 10g rolls along a horizontal table with velocity are 6m/s what is kinetic energy of coin

Answer 1

m=10g=10/1000kg=1/100kg
v=10m/s
Eₖ=1/2mv²
Eₖ= 1/2× 1/100×10×10
= 1/2 J

Answer 2

The kinetic energy of coin is 0.18 J.

Explanation:

Given that,

Mass of the coin, m = 10 g = 0.01 kg

Velocity of the coin, v = 6 m/s

To find,

The kinetic energy of coin.

Solution,

The kinetic energy of an object is possessed by its motion. It is given by :

$K=\dfrac{1}{2}mv^2$

$K=\dfrac{1}{2}\times 0.01\times (6)^2$

K = 0.18 Joules

So, the kinetic energy of coin is 0.18 J.

Learn more,

Kinetic energy

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