1-5. For the system shown, assume that the end of the cord at is pulled down with a speed of .

(1) determine the speed of block.

(2) If , what is the probability that the velocity of the block greater than 1.5 m/s ?

Solution

(1)

The time derivatives of the equations are

Eliminating , we obtain

So we have

Ans.

(2) When

Ans.