Question

the car moving with the velocity of 35 km/h and another car with 19 m/scompare the kinetic energy
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Answer 1

Answer:

ans.3.82

Explanation:

The 1st car was moving with a velocity of 35km/hr.

But,SI unit of velocity is m/s.

Since we can write 35km/hr as 35×5/18=9.72m/s.

Now kinetic energy = 1/2mv^2

=1/2×m×(9.72)² joule.

Now kinetic energy of 2nd car=1/2mv²

=1/2×m×(19)²

On comparing 1 and 2 we get

½m×361

---------------

½m×94.47

= 3.82.