Question

Find the mass
of the body which has
5J of Kinetic energy while moving
at a
speed of 2 m/s​

Answer 1

Answer:

kinetic energy 1/2mv^2

let mass of the body is m

velocity 2m/s

so

1/2*m*2²=5

m=5/2

=2.5

Answer 2

Answer: Mass = 2.5 kg

Step-by-step explanation:

Given :

Kinetic energy = 5 J

Speed = 2 m/S

To find : Mass of the body

Solution :

We know that ,

$\bf K.E. = \frac{1}{2}m\:v^2$

$Substituting\: values;$

$\implies 5 = \frac{1}{2}m\times2^2$

$\implies m = \frac {5\times2}{4}$

$\implies \bf m = 2.5 kg$

Hence, Mass of the body = 2.5 kg

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$\bf \Large Know\:more$

Kinetic energy is the energy possessed by an object by virtue of its motion.