Question

Calculate the K.E of a body of mass 2Kg moving with a speed 10 m/sec​

Answer 1

Answer :

➥ Kinetic energy of the body (K.E) = 100 J

Given :

➤ Mass of the body (m) = 2 kg

➤ Velocity of the body (v) = 10 m/s

To Find :

➤1Kinetic energy of the body (K.E) = ?

Solution :

As we know that

Kinetic energy of a body

$\tt{:\implies K.E = \dfrac{1}{2}m {v}^{2} }$

$\tt{:\implies K.E = \dfrac{1}{2} \times 2 {(10)}^{2} }$

$\tt{:\implies K.E = \dfrac{1}{ \cancel{2}} \times \cancel{2} \times 10 \times 10 }$

$\tt{:\implies K.E = 1 \times 10 \times 10}$

$\tt{:\implies K.E = 10 \times 10}$

$\tt{:\implies \green{ \underline{ \overline{ \boxed{ \purple{ \bf{ \: \: K.E = 100 \: j \: \: }}}}}}}$

Hence, the kinetic energy of the body is 100 J.

Answer 2

$\star\:\:\:\bf\large\underline\blue{Given:—}$

☛︎Mass of the body, m = 2 kg

☛︎Velocity of the body, v = 10 m/s

$\star\:\:\:\bf\large\underline\blue{To\:find:—}$

kinetic energy of the body = ?

$\star\:\:\:\bf\large\underline\blue{Solution:—}$

$\boxed{\bf{\pink{Formula\:used:—K.E=\frac{1}{2}mv²}}}$

$K.E=\frac{1}{2}×2×10²\:J$

$K.E=\frac{1}{2}×2×100\:J$

$\boxed{\bf{\red{K.E=100\:J}}}$

Therefore, kinetic energy (K.E) of the body is 100 J

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