Question

Calculate the speed of a 5 kg object that possesses 20 J of kinetic energy KE=1/2

mv2
2.83 m/s/s
2.83 m/s
2 m/s
4 m/s

Answer 1

2.83 m/s

Step-by-step explanation:

m = 5 kg,

KE = 20 J

KE = mv^2/2

20 = 5*v^2/2

5*v^2 = 40

v^2 = 8

v =
`√(8)` = 2.83 m/s