Question

Numerical :

A car is moving with a speed of 15 km h-¹ and another identical car is moving with a speed of 30 km h-¹. Compare their kinetic energy.​

Answer 1

Answer:

if the mass of the two bodies is same then the kinetic energy only depends on the speed of the two bodies

Answer 2

คภรฬєг

Two identical cars means , they have equal mass

K.E.=

$(1 \div 2)m{v}^{2}$

Let m be the mass of each car 

Kinetic energy of car A = 1/2m×(15)^2=225/2m

Kinetic energy of car B = 1/2m×(30)^2=450m

K.E.ofA / K.E.of B =225m/2×450m=1/4=1:4

 K.E. of car B is 4 times K.E. of car A.

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