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JEE Advanced 2014 Paper 2
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© examsnet.com
Question : 17
Total: 60
A person in a lift is holding a water jar, which has a small hole at the lower end of its side. When the lift is at rest, the water jet coming out of the hole hits the floor of the lift at a distance d of 1.2 m from the person. In the following, state of the lift’s motion is given in List I and the distance where the water jet hits the floor of the lift is given in List II. Match the statements from List I with those in List II and select the correct answer using the code given below the lists.
List I
List II
P.
Lift is accelerating vertically up
1.
d= 1.2 m
Q.
Lift is accelerating vertically down with an acceleration less than the gravitational acceleration
2.
d > 1.2m
R.
Lift is moving vertically up with constant speed
3.
d < 1.2m
S.
Lift is falling freely
4.
No water leaks out of the jar
P-2, Q-3, R-2, S-4
P-2, Q-3, R-1, S-4
P-1, Q-1, R-1, S-4
P-2, Q-3, R-1, S-1
Validate
Solution:
In P, Q, R no horizontal velocity is imparted to falling water, so d remains same. In S, since its free fall,
a
e
f
f
= 0
∴ Liquid won’t fall with respect to lift.
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