A 1000kg car has 50,000 joules of kinetic energy. What is the speed?
Physics
rosie46
Question
A 1000kg car has 50,000 joules of kinetic energy. What is the speed?
2 Answer

1. User Answers 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
[tex] \sqrt{10} = v[/tex]
about 3 m/s (in terms of significant figures) 
2. User Answers fc808
Answer:
½mv²= KE
½(1000)?²= 50000
500*?²= 50000
500 500
? ²=100
Square root
?= 10
10 m/s is you answer