Verified Answer :

calculusxy

K.E = 1/2mv^2

The kinetic energy is 50,000 J and the mass of the car is 10,000 kg. 

50,000 J = 1/2(10,000kg)v^2
Solve for v (velocity) 
50,000 J = 5,000 kg x v^2
10 = v^2
\(\sqrt{10} = v\)
about 3 m/s (in terms of significant figures)

fc808

Answer:

½mv²= KE

½(1000)?²= 50000

500*?²= 50000

500          500

? ²=100

Square root

?= 10

10 m/s is you answer

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