Kinematics Question 409

Question: A stone falls freely under gravity. It covers distances h1,h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1,h2 and h3 it’s

Options:

A) h1=h23=h35

B) h2=3h1andh3=3h2

C) h1=h2=h3

D) h1=2h2=3h3

Show Answer

Answer:

Correct Answer: A

Solution:

∴h=12gt2 ∴h1=12g(5)2=125

h1+h2=12g(10)2=500⇒h2=375

∴h1+h2+h3=12g(15)2=1125

⇒h3625

h2=3h1,h3=5h1 or h1=h23=h35

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