Give two explanations of why a cannonball fired from a long-barrel cannon will have a greater velocity than from a shorter cannon

What will be an ideal response?


Answer: In terms of impulse-momentum, the longer barrel means the time during which the exploding powder pushes on the cannonball is longer. This means more impulse, which in turn means more gain in momentum, and greater velocity. In terms of work-energy, the longer barrel means a longer distance for the force to act, which means greater work on the ball inside the barrel and more gain in kinetic energy, and greater velocity.

Physics & Space Science

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Martian volcanoes are _______________ volcanoes with gradual slopes

Fill in the blank(s) with correct word

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Answer the following statement true (T) or false (F)

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If the radius of the Earth somehow decreased with no change in mass, your weight would

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