Question

A 1000-kg car has 50,000 joules of kinetic energy. What is the 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

Kinetic Energy = 1/2×m×v²
50000 = 1/2×1000×v²
v = √100
v = 10 m/s