please help with physics of mechanical energy problem 10 pts?
When a rifle with a longer barrel is fired, the force of expanding gases act on the bullet for a long distance. What effect does this have on the speed of the bullet-ups? (do u see why guns long range barrels have time? A baseball and a golf ball have the same momentum, what has the greatest kinetic energy? someone who wants to sell a Superball states that jumps to a height greater than the height from which it fell. can this be?
1 Question. The longer the barrel longer the gases expand and accelerate the bullet, which increases the speed of the bullet as it leaves the barrel. 2nd question of the golf ball has more kinetic energy, It has less friction with Item 3 of air resistance that has been so long since physics class, but I think that is possible provided that the ball is made of a material that stores energy, while fall and has extra energy when hitting the ground giving a higher rebound fell
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