A cat and a mouse run along a road with the same kinetic energy. the faster runner is the12/26/2023 The acceleration is 9.8 m/s 2 downward, so we can write an acceleration equation: On the upward leg, the initial velocity is 27 m/s, and the final velocity is 0 m/s (giving us an average velocity of 13.5 m/s). That fact alone is what allows us to be able to solve problems like this. Second, the velocity at the very top of the trajectory is zero, just before the ball begins its downward trip. That downward acceleration is slowing the ball on its way up and speeding it up on its way down. First, once a projectile (the ball) is released from whatever force launches it, there is no more upward acceleration at all any remaining acceleration is the downward acceleration of gravity, which we call g ( g = 9.8 m/s 2). Solution: There are a couple of important things to realize about a problem like this. The figure below breaks the problem up into two "legs," upward and downward, and organizes what we know and don't know.
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