Question

Calculate the kinetic energy of a car of mass 500 kg moving
with a velocity of a
13 km) hr. Find the new kinetic energy
if two passengers of mass 50 gram is sit the car?​

Answer 1

The answer is 3255.32 J

Explanation:

1st convert 13km/h to m/sec.

So,

It will be 13*5/18 so it will be =3.61 m/sec.

Now ,

=500 kg + 50÷ 1000

=500kg +0.05kg

=500.05kg

And,now

The formula for Kinetic energy is

= 1/2 mass * (velocity)²

= 1/2 500.05 * ( 3.61)²

= 1/2 500.05 * 13.03

= 500.05 * 6.51 ( Note : After cancelling by 2 to 13.03)

= 3255.32 J

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