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Option 3. The speed of lower end gets smaller and smaller and vanishes when upper end touches ground Option 4. The speed of lower end remain constant till upper end touches ground. Plz answer IMAGE IS ATTACHED Ans is 3

Option 3.  The speed of lower end gets smaller and smaller and vanishes when upper end touches ground
Option 4.   The speed of lower end remain constant till upper end touches ground.
Plz answer
IMAGE IS ATTACHED
Ans is 3
 

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1 Answers

Utsav Basu
70 Points
5 years ago
     y2+x2=l2
or, 2y dy/dt+2x dx/dt = 0
or, x dx/dt = -y(-vy) = yvy     [Let dy/dt = -vy]
or, vx = vy(y/x)
 
Thus, since with time y decreases and x increases you will have the said result.
 
PS. I am also in Aakash. What’s your name?

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