Answered

A car of mass 2.4×10³ kg is traveling along the road when the speed of the car is increased to a speed of 32 m/s. The increase in speed results in 3.0×10⁵ J of work done on the car. Determine the initial speed of the car.



Answer :

Explanation:

so you know the work done = Kinetic energy

so you can modify the formula of K.E as

1/2*m*(v^2-x^2), v= final speed , and x=initial speed

1/2*2.4*10^3*(32^2-x^2)=3*10^5

solve for x

which gives around 27.8 m/s

Other Questions