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A ball is dropped at t=3s. FindA) Instantaneous speed at t=18sB) avg. Speed at t=20s

A ball is dropped at t=3s. FindA) Instantaneous speed at t=18sB) avg. Speed at t=20s

Grade:11

1 Answers

sonika p
129 Points
5 years ago
since, ball is dropped at t = 3s, initial speed = 0
v= gt,
g=9.8m/s2
  1. instantaneous speed – = 9.8*18 = 176.4m/s
  2. average speed = 0.5*9.8*(20+3) = 112.7m/s

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