Verified Answer :

iamsreejareddy

You have the Mass of the body as 1000kg and the Kinetic energy as 50,000 Joules. You know that Work done is equal to the change in Kinetic energy. So
W= K(final) - K(initial)
where "K" is the Kinetic energy
W= 1/2mv*2 - 0
because the inital speed of the car is 0m/s
Substitute the values, W= 50000 , m=1000 kg and solve for "v" velocity of the car.
V = 10m/s
I hope I was helpful :)

Answer: The speed of the car is 10 m/s.

Explanation:

Mass of the car , m= 1,000 kg

Kinetic energy of the car,K.E =50,000

\(K.E=50,000 Joules=\frac{1}{2}mv^2=\frac{1}{2}\times 1,000 kg\times v^2\)

\(v^2=\frac{2\times 50,000 Joules}{1,000 kg}=100 m^2/V62\)

v = 10 m/s

The speed of the car is 10 m/s.

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