Question

a body of mass of 60 kg has kinetic energy of 7.5×10^4J find its speed pls give the ans in brief ​

Answer 1

Answer:

v = 50 m/s

Explanation:

kinetic energy =  $\frac{1}{2}$ $mv^{2}$ =  7.5 × $10^{4}$J

$\frac{1}{2}$ $mv^{2}$ = 7.5 × $10^{4}$J

$mv^{2}$ = 7.5 × $10^{4}$ x 2

60 x $v^{2}$ = 15 x $10^{4}$

$v^{2}$ = (15 x $10^{4}$) / 60

$v^{2}$ = $10^{4}$ / 4

v = $10^{2}$ / 2

v = 100 /2 = 50 m/s