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1) A student throws a ball vertically upward such that it travels 6.9 m to its maximum height,If the ball is caught at the initial height 2.1 second after being thrown, what is the ball's average speed and average velocity?

2) During liftoff, a hot-air balloon accelerates upward at a rate of 2.9 m/s² , The balloonist drops an object over the side of the gondola when the speed is 14 m/s ..How long does it take to hit the ground?

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Category:- Physics
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