Question

What is the work required to increase the speed of 0.4kg ball from 1m/s to 3m/s ?​

Answer 1

Answer:

1.6 J

Explanation:

K.E = (1/2)mv^2

= 0.5(0.4)

= 0.2 kgm^2/s^2

K.E ' = (1/2)mv^2

= 0.5(0.4)9

= 1.8 kgm^2/s^2

So the difference is the work = 1.6 J