During World War I, Germany used a \"Big Bertha\" cannon to hurl shells into Par

Question

During World War I, Germany used a "Big Bertha" cannon to hurl shells into Paris 30 miles away. This gun also had a long barrel. What is the reason for using a long barrel in these guns? ANSWER: During World War I, Germany used a "Big Bertha" cannon to hurl shells into Paris 30 miles away. This gun also had a long barrel. What is the reason for using a long barrel in these guns? a. To reduce the force exerted on the bullet due to the expanding gases from the gunpowder. b. To reduce frictional losses. c. To increase the force exerted on the bullet due to the expanding gases from the gunpowder. d. To allow the force of the expanding gases from the gunpowder to act for a longer time. e. To provide a larger ratio of kinetic energy to potential energy.

Explanation / Answer

d. To allow the force of the expanding gases from the gunpowder to act for a longer time.

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