Question

An object has 100J of KE. It has a mass of 10kg. How fast is it travelling

Answer 1

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

`100 = (1)/(2) * 10 * v {}^(2)`

`100 = 5v {}^(2)`

`v {}^(2) = 20`

`v = √(20) = 2 √(5)`