Question

- A box of mass 2 kg increases its speed from 3 m s to
7 ms. What is the increase in kinetic energy?​

Answer 1

Answer:

40

Step-by-step explanation:

m=2 kg

v1 = 3 m/s

K.E1 = 1/2.m.v1^2

= 1/2.(2).(3^2) = 9 j

v2 = 7 m/s

K.E2 = 1/2.m.v2^2

= 1/2.(2).(7^2) = 49 j

Increase in KE = KE2 - KE1 = 40

Mark brainliest if helpful

Answer 2

Answer:

niceeeeee3eeeeeew2weeeeeee