KinematicsHard
Question
In the arrangement shown in the figure the ends P and Q of an unstale string move downwards with uniform speed U. Pully A and B are fixed. Mass M moves upwards with a speed
Options
A.2U cos θ
B.U/cos θ
C.2U/cos θ
D.U/cos θ
Solution
In a right angle ᐃRQR
l2 = 2 + y2
Differentiating this equation with respect to time, we get
2l
= 0 + 2y
or
= 
Here, -
= vm
= 
and -
= U Hence, vm =
∴ Correct option is (b).
Create a free account to view solution
View Solution FreeMore Kinematics Questions
A point mass is projected, making an acute angle with the horizontal. If angle between velocity and acceleration is _...A particle P is projected from a point on the surface of smooth inclined plane (see figure). Simultaneously another part...The displacement of a particle moving in a straight line depends on time (t) as : x = αt3 + βt2 + γt + &#...Which of the following statement are true for a moving body ?...A balloon with mass m is descending down with an acceleration a (where a...