A car has a mass of 8000kg and a kinetic energy of 24,000j. What is the speed?

Physics

1 answer:

Oxana [17]3 years ago

7 0

Answer:

2.5m/s

Explanation:

Kinetic energy = 1/2 mv²

Mass = m= 8000kg

Velocity(speed) = v =

K. E = 24000J

K. E = 1/2 x 8000 x v²

24000 = 4000 x v²

Divide both sides by 4000

V²= 24000/4000

V² = 6

Find square root of both sides

V = √6

V = 2.5 m/s

The S. I unit of energy is joules with symbol J

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