PHYSICS
A body starts from rest on a long inclined plane of slope 45 . The coefficient of friction between the body and the plane varies as μ=0.3x, where x is the distance travelled down the plane. The body will have maximum speed (for g=10m/s when x=:
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Answer:
N=mgcos45
o
acceleration = gsin45
deceleration = μgcos45
o
Net acceleration = (gsin45
o
−4gcos45
o
)
max speed will be reached
when gsin45
o
=4gcos45
o
g(
5
2
1
)=(0.3x)
5
g
3
10
m=x
x=3.33m
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