The rubber cord of a catapult has a cross sectional area 1"mm"^(2) and total unstretched length 10cm. It is stretched to 12cm and then released to project a missile of mass 5gm. Taking Y for rubber 5 xx 10^(8) "Nm"^(-2) calculate the velocity of projection....

The rubber cord of a catapult has a cross sectional area 1"mm"^(2) and

1.	The rubber cord of a catapult has a cross sectional area 1"mm"^(2) and total unstretched length 10cm. It is stretched to 12cm and then released to project a missile of mass 5gm. Taking Y for rubber 5 xx 10^(8) "Nm"^(-2) calculate the velocity of projection....
Answer» `10 "ms"^(-1)` `15 "ms"^(-1)` `20 "ms"^(-1)` `25 "ms"^(-1)` Answer :B