Question

A ball of mass 0.5k has 100 Joules of kinetic energy what is speed of the ball​ full solution please

Answer 1

here's the solution : -

we know, kinetic energy (k.e) =

`(1)/(2) mv { }^(2)`

where,

• m = mass
• v = velocity

So,

=》

`100 = (1)/(2) * 0.5 * {v}^(2)`

=》

`(100 * 2)/(0.5) = {v}^(2)`

=》

`(2000)/(5) = {v}^(2)`

=》

`400 = {v}^(2)`

=》

`v = √(400)`

=》

`v = 20\: \: ms {}^( - 1)`