Question

) Calculate the kinetic energy of a body of mass 4 kg moving with a speed
10 m/s ?​

Answer 1

$\huge{\bf{\green{\mathfrak{\dag{\underline{\underline{Question:-}}}}}}}$

$\bullet{\longmapsto}$ Calculate the kinetic energy of a body of mass 4 kg moving with a speed 10 m/s ?

$\huge {\bf{\orange{\mathfrak{\dag{\underline{\underline{Answer:-}}}}}}}$

$\bullet{\leadsto} \: \textsf{Mass of the body = 4 kg.}$

$\bullet{\leadsto} \: \textsf{Speed of the body = 10 m/s.}$

$\bullet{\leadsto} \: \textsf{Kinetic energy = }$

$\bullet{\leadsto} \: \boxed{\pink{\sf Kinetic \: Energy \: = \: \dfrac{1}{2} mv^{2}}}$

$\bullet{\leadsto} \: \textsf{Substituting the values,}$

$\bullet{\leadsto} \: \sf \dfrac{1}{2} mv^{2}$

$\bullet{\leadsto} \: \sf \dfrac{1}{2} \: * \: 4 \: * \: 10^{2}$

$\bullet{\leadsto} \: \sf \dfrac{1}{\cancel{2}} \: * \: \cancel{4} \: * \: 100$

$\bullet{\leadsto} \: \sf 2 \: * \: 100$

$\bullet{\leadsto} \: \underline{\boxed{\purple{\sf 200 \: J.}}}$

$\huge{\bf{\red{\mathfrak{\dag{\underline{\underline{Conclusion:-}}}}}}}$

$\bullet{\longmapsto} \: \boxed{\therefore{\sf Kinetic \: Energy \: of \: the \: body \: = \: 200 \: J.}}$

Answer 2

Given,
Mass(m) = 4 kg
Velocity(v) = 10 m/s
Kinetic Energy (KE) = 1/2 mv^2
= 1/2*4*10^2
= 1/2*4*100
= 1/2*400
= 400/2
= 200 Joule