Asked by Chris
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.
I got 16454 J right. Now why is it positive?
K-K = negative if Velocity from rest is 0.
Answers
Answered by
Damon
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.
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.
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