Question

III) An object of mass 15 kg is moving with a uniform velocity of 4 metre per second
What is
the kinetic energy possessed by the object?
a) 12 joule
b) 60 joule
c) 120 joule d) 3.75 joule​

Answer 1

$KE = \frac{1}{2} m {v}^{2}$

$= \frac{1}{2} \times 15 \times {4}^{2}$

$= \frac{1}{2} \times 15 \times 16$

$= 15 \times 8$

$= 120 \: joules$

Answer 2

m=15kg

v=4mpersecond

kinetic energy =1/2mv²

=1/2*15*16

=120J