Question

a body of mass 200 gram slowdown from a speed of 5 metre per second to 3 metre per second find the change in kinetic energy of the body ​

Answer 1

Answer:

1.6 J

Explanation:

The formula of kinetic energy is=1\2x m x v^2

First we have to convert mass, grams to kilograms

Then we will find the initial kinetic energy by putting the value in the above formula.--

1\2x .2 x 5^2, after the calculation you will find the initial kinetic energy as 2.5 J

Then we find the final kinetic energy---

1\2x .2 x 3^2, after the calculation you will find the final kinetic energy as .9 J

Finally, you have to subtract the final kinetic energy from the initial kinetic energy---

2.5-.9= 1.6 J

Hope this helps