. A car is going on an overbridge of radius R,
maintaining a constant speed. As the car is
descending on the overbridge from point B to C, the
normal force on it :
4N
B
mg
77
(a) increase
(6) decreases
(c) remains constant
(d) first increases then decreases.
Answers
Answered by
0
Answer:
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Answered by
3
Answer:
Let the speed of the car be v and normal reaction acting on the car be N
′
.
Using circular motion equation for the car :
R
mv
2
=mgcosθ−N
′
⟹ N
′
=mgcosθ−
R
mv
2
As the car moves from point B to C, θ changes from 0
o
to 90
o
.
As cosine is a decreasing function from 0
o
to 90
o
, thus N
′
decreases when the car moves from B to C.
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