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JEE Mains Model Paper 9
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© examsnet.com
Question : 24 of 90
Marks:
+1
,
-0
Two fixed frictionless inclined plane making an angle 30° and 60° with the vertical are shown in the figure. Two blocks A and B are placed on the two planes. What is the relative vertical acceleration of A with respect to B?
4.9
m
s
−
2
in horizontal direction
9.8
m
s
−
2
in vertical direction
zero
4.9
m
s
−
2
in vertical direction
Validate
Solution:
mg sin θ = ma
∴ a = g sin θ
where a is along the inclined plane
∴ vertical component of acceleration is g
s
i
n
2
θ
∴ relative vertical acceleration of A with respect to B is
g [
s
i
n
2
60-
s
i
n
2
30] =
g
2
= 4.9 m/
s
2
in vertical direction.
© examsnet.com
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