a force of 10 Newton is applied on an object for 10 seconds so that the velocity of the object changes from 20 metre per second to 30 metre per second. calculate the work done.
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Explanation:
Work = force × displacement (W = F × s)
Given :
Force = 10 N
time (t) = 10 second
initial velocity (u) = 20ms-¹
final velocity (v) = 30ms-¹
v = u + at
30 = 20 + a(10)
30-20 = a(10)
10 = a(10)
a = 1ms-²
s = ut + 1/2 × at²
s = 20(10) + 1/2 × 1(10)²
s = 200 + 50
s = 250 m
Work = F × s
W = 10 × 250
W = 2500 joule
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