Question

A 1000-kg car has 50000 joules of kinetic energy what is its speed

Answer 1

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 2

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

Step-by-step explanation:

Mass of the car , m= 1,000 kg

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

`K.E=50,000 Joules=(1)/(2)mv^2=(1)/(2)* 1,000 kg* v^2`

`v^2=(2* 50,000 Joules)/(1,000 kg)=100 m^2/V62`

v = 10 m/s

The speed of the car is 10 m/s.