A heavy block 'B' is sliding with constant velocity u on a horizontal table. The width of the block is L. There is an insect A at a distance d from the block as shown in the figure. The insect wants to cross to the opposite side of the table. It begins to crawl at a constant velocity v at the instant shown in the figure. Find the least value of v for which the insect can cross to the other side without getting hit by the block.

A heavy block 'B' is sliding with constant velocity u on a horizontal

1.	A heavy block 'B' is sliding with constant velocity u on a horizontal table. The width of the block is L. There is an insect A at a distance d from the block as shown in the figure. The insect wants to cross to the opposite side of the table. It begins to crawl at a constant velocity v at the instant shown in the figure. Find the least value of v for which the insect can cross to the other side without getting hit by the block.
Answer» Answer :`v_(MIN) = (uL)/(sqrt(d^(2) +L^(2))`