A applied on a body of mass 2 kg for 5 seconds change its velocity for 10 metre per second to 20 metre per second find the work done
Answers
Answered by
7
Answer:
4J
Explanation:
work done = mass × acceleration
= 2×(v-u/t)
= 2× (20-10/5)
=2×(10/5)
=2×2
=4 J.
hope it's usefull.
Answered by
5
ANSWER :
Work done on the body is 300J
EXPLANATION :
Work = force × displacement
a = (v-u) / t
a = (20-10)/5
a = 10/5 = 2 m/s²
Force = m×a = 2×2 = 4 N
Displacement, s=ut+1/2 at²
s = 10×5 + 1/2 × 2×25
s = 50 + 25
s = 75 m
Work = 4×75 = 300 J
So the work done is 300J
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