Question

A car with mass of 700 kg is moving with a speed of 20 m/s calculate the kinetic energy of a car

Answer 1

Hêy Fríèñd..

Mass = 700kg

velocity = 20 m/s

$Kinetic \:Energy = \frac{mv^2}{2}\\K.E = \frac{700 * 20 * 20}{2}\\K.E = 140000 J\\K.E = 140 kJ$

Ans. K.E = 140 kJ

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Answer 2

Given,
Mass of the car=700kg,
Speed of the car=20m/s

To Find,
The kinetic energy of the car.

Solution,
We know that,

kinetic energy=1/2×mass×(velocity)²

                        =1/2×700×(20)²

                        =1/2×700×400

                        =140000J

Hence, the kinetic energy of the car is 140000J.