Question

Kinetic energy of a ball of mass 50g is 10j . Find the speed of ball.

Answer 1

Answer:

k.e = 1/2×m×v^2

m=50g=0.050kg

therefore

10= 1/2×0.05×v^2

10=0.025×v2

10÷0.025=v2

400=v2

20=v(in k.e velocity and speed are same)

Answer 2

Answer:

K.E=1/2 x mv^2

let's convert the mass in kg...

m=50g

  =0.050kg

therefore,

10=1/2 x 0.05 x v^2

10=0.025 x v^2

v^2=0.025/10

v^2=400

v=20

Explanation:

why v when speed was asked??

in K.E speed and velocity are the same