When the distance between a point source of light and a light meter is reduced from 6.0m to 2.0 m, the intensity of illumination
1 answer:
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Answer:
v = at + u
Explanation:
acceleration, a = constant
As we know that acceleration is the rate of change of velocity
integrate on both sides
v = at + u
Where, u is the integrating constant and here it is equal to the initial velocity
Now we know that the rate of change of displacement is called velocity
Integrate on both sides
where, xo is the integrating constant which is initial position of the particle.
Answer:
The work done by the frictional force is 600J.
Explanation:
The work done by the frictional force is
.
Now, and
; therefore,
Hence, the work done by friction is 660J.