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Paul [167]
3 years ago
15

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

Physics
2 answers:
bixtya [17]3 years ago
5 0

Answer:

½mv²= KE  

½(1000)?²= 50000

<u>500</u>*?²= <u>50000 </u>

500          500

? ²=100

Square root  

?= 10

10 m/s is you answer

djyliett [7]3 years ago
4 0
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) 
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