Question

find out the kinetic energy of a car of mass 3000 kg moving with a constant velocity of 60 km per hr

Answer 1

ke=1/2mv^2
=1/2 ×3000×3600
=3000×1800
=5400000

Answer 2

Answer:

Explanation:

Given,

Mass of the body, m = 3000 kg

Velocity of the body, v = 60 km/h = 50/3 m/s

To Find,

Kinetic energy, K.E

Formula to be used,

Kinetic energy = 1/2 × mv²

Solution,

Putting all the values, we get

Kinetic energy = 1/2 × mv²

⇒ Kinetic energy = 1/2 × 3000 × (50/3)²

⇒ Kinetic energy = 1500 × 50/3 × 50/3

⇒ Kinetic energy = 1500 × 277.77

⇒ Kinetic energy = 416666.67 J

Hence, the kinetic energy of the body is 416666.67 J.