Question

A 1,000 kg car has 50,000 joules of kinetic energy what is its speed??

Answer 1

½mv²= KE

½(1000)?²= 50000

500*?²= 50000

/500 /500

? ²=100

Square root

?= 10

10 m/s is you answer

Answer 2

using KE=1/2mv^2

v=
`\sqrt{50000/500`

so v=10