Physics
posted by Priscilla on .
The speed of an automobile of mass 1600 kg increases uniformly from 20 m/s to 30 m/s. What is the increase in its kinetic potential?
Given:
m = 1600 kg
V = 10 m/s
KE = 1/2 m v^2
KE = 1/2 (1600)(10)^2
KE = 80,000 J
Is this right?

No, not even close.
KEincrease=1/2 m (Vf^2Vi^2)
= 1/2 1600 *(900400)