amandanunnery33
08.04.2021 •
Physics
.
Law of Conservation of Momentum
(for a perfect system)
Total Momentum Before Total Momentum After
(20kg)(2m/s) + (10kg)(-1m/s) = (20kg)(0.5m/s) + (10kg)( 2m/s)
40kg m/s + -10kg m/s 10kg m/s + 20kg m/s
30kg m/s 30 kg m/s
-
Solved
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Ответ:
40 J
Explanation:
Work = change in energy
W = 1/2 k (Δx)²
First we need to find the value of k.
F = kΔx
10 N = k (0.04 m)
k = 250 N/m
Solving for work
W = (250 N/m) (0.40 m)²
W = 40 J