A body of mass 0.5 kg is moving at a constant velocity of 2ms^-1 to bring it to rest in 2m the work done is
a) 0.5 J
b) 1.0 J
c) 2.0 J
d) 4.0J
Answers
Answered by
5
Answer:
(b) work done W = 1.0 J
Explanation:
Given
mass m = 0.5kg
velocity v = 2 m/s
distance s = 2 m
work done W = ??
Solution
As we know that
work = K.E
we can write
W = 1/2 mv²
W = 1/2 (0.5 kg) (2 m/s)²
W = 1/2 X 0.5 X 4
W = 1 J
Answered by
1
Answer:
Explanation:
According to law of conservation, Work Done = Change in kinetic Energy
⇒W=ΔK.E
w= 1/2 m v^2
= 1/2 0.5 * 2^2
1 J
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