A stone is dropped from a height of 20 m (g = 9.8 m/s^2, no air resistance). It reaches the ground after:

  1. 1.01 s
  2. 2.02 s
  3. 4.04 s
  4. 2.86 s
Answer

B) 2.02 s

h = 12gt^2 Rightarrow t = 2hg = 2(20)9.8 = 2.02 s. SLO P-11-B-04 · Application

Physics MCQ · More Kinematics and Projectile Motion MCQs · Practise