Question

find the kinetic energy of an object of mass 10 kg which is moving with uniform velocity of 4 metre per second

Answer 1

m = 10 kg

v = 4m/s

K.E = 1/2 mv^2

K.E = 1/2 × 10 × (4)^2

K.E = 1/2 × 10 × 16

K.E = 80 J

Answer 2

Kinetic energy=1\2mv^2

=1\2×10×(4)^2

=1\2×10×16

=80j