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A ball must decelerate from 20 m/s up to 0 m/s, then must accelerate to 10 m/s down. Since these velocities are vectors and are
A ball must decelerate from 20 m/s "up" to 0 m/s, then must accelerate to 10 m/s down. Since these velocities are vectors and are in different directions, they must be represented with different signs. Let up be positive and down be negative. (a =- 9.81 m/s acceleration due to gravity). Calculate the time it took the ball to go up and come back down
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