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Questions

AvrilLorrainee @AvrilLorrainee

September 2022 1 3 Report

What is the kinetic energy of a running boy whose mass is equal to 50 and a velocity of 5m/s.

Answers & Comments

$\bold {Kinetic \: Energy \: Word \: P roblem}$

$\color{darkblue}{ \underline {\rm{ Problem : }}}$

What is the kinetic energy of a running boy whose mass is equal to 50 and a velocity of 5m/s.

$\color{darkblue}{ \underline {\rm Find : }}$

Kinetic Energy

$\color{darkblue}{ \underline {\rm Formula : }}$

$\large \rm KE = \tt \frac{1}{ \: 2 \: } { \sf mv}^{2}$

$\color{darkblue}{ \underline {\rm Solution : }}$

$\large \rm KE = \tt \frac{1}{ \: 2 \: } { \sf mv}^{2} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \large \rm KE = \tt \frac{1}{ \: 2 \: } (50 \sf{kg}) \times (5 {m/s}^{ \tt2} ) \\ \large \rm KE = \tt (25 \sf{kg}) \times ( \tt25 \sf{m/s}^{ \tt2} ) \: \: \: \\ \large \rm KE = \tt 625 \sf{kg. {m}^{ \tt2}/ {s}^{ \tt2} } \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \large \boxed{\rm KE = \tt 625 \: J} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\color{darkblue}{ \underline {\rm Answer : }}$

$\large{ \underline{ \boxed{ \tt{ \: 625\:J }}}}$

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