What is barrel?

A gun is aimed at a target in line with its barrel. The target is released and allowed to fall under gravity, at the instant, the gun is fired. The bullet will

What is cornea? What is its function?

What is an error? What are constant errors?

What is bacteria ? In what way is it useful?

What is global warming? What are its effects?

Which barrel shown in the adjacent figure can hold less water ?

Which barrel shown in the below figure can hold more water? Discuss with your friends.

In a spring gun having spring constant 100 N/m, a small ball of mass 0.1 kg is put in its barrel by compressing the spring though 0.05 m as shown in Figure. The ball leaves the gun horizontally at a height of 2 m above the ground. Find (a) The velocity of the ball when the spring is released. (b) Where should a box be placed on the ground so that that ball falls in it. (g=10 m//s^(2))