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Q.

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 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 list. 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>1.2 m R. Lift is moving vertically up with constant speed 3. d<1.2 m S. Lift is falling freely 4. No water leaks out of the jar List IList IIP. Lift is accelerating vertically up 1. d=1.2 m Q. Lift is accelerating vertically down with an acceleration less than the gravitational acceleration2. d>1.2 m R. Lift is moving vertically up with constant speed3. d<1.2 m S. Lift is falling freely 4. No water leaks out of the jar

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a

P−2 Q−3 R−2 S−4

b

P−2 Q−3 R−1 S−4

c

P−1 Q−1 R−1 S−4

d

P−2 Q−3 R−1 S−1

answer is C.

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Detailed Solution

h1=height of water above the hole h2=height of water below the hole(P)  geff>g, d=4h1h2=1.2m(Q)  geff
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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 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 list. 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>1.2 m R. Lift is moving vertically up with constant speed 3. d<1.2 m S. Lift is falling freely 4. No water leaks out of the jar List IList IIP. Lift is accelerating vertically up 1. d=1.2 m Q. Lift is accelerating vertically down with an acceleration less than the gravitational acceleration2. d>1.2 m R. Lift is moving vertically up with constant speed3. d<1.2 m S. Lift is falling freely 4. No water leaks out of the jar