A shell is launched from a cannon and explodes mid-air. Which of the following i

Question

A shell is launched from a cannon and explodes mid-air. Which of the following is correct after the explosion? Select one: the explosion exerts only internal forces on the shell, but gravity is an external force, its horizontal momentum is conserved but its vertical momentum is not conserved. Since the explosion exerts external forces on the shell, neither its horizontal momentum nor its vertical momentum is conserved. Since the explosion exerts only internal forces on the shell, but gravity is an external force, its vertical momentum is conserved but its horizontal momentum is not conserved. Since the explosion exerts only internal forces on the shell, but gravity is an external force, neither its horizontal momentum nor its vertical momentum is conserved. Since the explosion exerts only internal forces on the shell, both its horizontal and vertical momenta are conserved.

Explanation / Answer

e is correct

Since the explosion exerts only internal forces.both its horizontal and vertical momentum is conserved.

In any explosion, an internal impulse acts in order to propel the parts of a system into a variety of directions. After the explosion, the individual parts of the system have momentum. If the vector sum of all individual parts of the system could be added together to determine the total momentum after the explosion, then it should be the same as the total momentum before the explosion. Just like in collisions, total system momentum is conserved

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