Question

the kinetic energy of a body of mass 4 kg is 200 joule . calculate its velocity​

Answer 1

Answer:

the formula for kinetic energy is :- 1/2 mv²

here, m= mass &

v= velocity

now , putting the value in the formula

200 = 1/2 × 1 × v²

400 = v²

v = √400

we get , v = 20

so , the velocity of body is 20m/s

Answer 2

Answer:

v = 10

Explanation:

Formula of kinetic energy is 1/2mv^2

Given: M = 4 kg

K.E = 200J

v = ?

By putting values in the formula, we get

1/2 mv^2 = K.E

1/2×4×v^2 = 200J

v^2 = (200×2)/4

v^2 = 100

v =√100

v = 10