Question

A 1,000 kg car has 50,000 joules of kinetic energy. What is it’s 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

good luck

Answer 2

K.E= 50,000 Joules= 1/2mv^2=1/2x1,000kgxv^2

v^2=2x50,000 Joules/1,000kg = 100m^2/v62

v=10m/s

The speed of the car is 10 m/s