no, if you push something to get it going you do positive work on it. Your force is in the direction of motion.
I you were pushing a spring, it would do negative work on you.
-(1/2)k x^2 :)
but you would do positive work on it.
A truck carrying a 57 kg crate accelerates uniformly from rest to 86.5 km/hr in 18.4 s. Calculate the work done on the crate by the truck (in J).
I got 16454 J right. Now why is it positive?
K-K = negative if Velocity from rest is 0.
1 answer
1 answer