Question

- Solve the numerical problems:
a. Find out the kinetic energy of a car of mass 3000 kg moving With a constant
velocity of 60km/hr
​

Answer 1

mass(m) =3000kg

Velocity(v) =60km/hr

Kinetic energy = ½mv²

= ½ × 3000 × (60)²

= 1500 × (3600)

= 5,400,000Joule

Answer 2

Kinetic energy = (1 ÷ 2)×mv2

Here

Mass m = 3000kg

Velocity v = 60 km ph

60×5 ÷18

=16.67 m÷s

So kinetic energy

= 3000×16.67 = 50010 j