A man standing in the roof of a building which is 100 meters high throws a ball vertically downward with an initial velocity of 20 m/s.The acceleration due to gravity is 9.8m/s/s.What is the velocity of the ball aftre it has been falling for 1.5s?

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Answer 1 · 2018-04-18T17:46:52

#v=34.7 ms^-1#

We can use the equation of motion

#" "v=u+g t#

#rArr" "v=20+9.8xx1.5#

#rArr" "v=34.7 ms^-1#