Kinematics Question 212
Question: A body sliding on a smooth inclined plane requires 4 seconds to reach the bottom starting from rest at the top. How much time does it take to cover one-fourth distance starting from rest at the top [BHU 1998]
Options:
A) 1 s
B) 2 s
C) 4 s
D) 16 s
Show Answer
Answer:
Correct Answer: B
Solution:
$ S=ut+\frac{1}{2}at^{2}=0+\frac{1}{2}at^{2} $ Hence $ t\propto \sqrt{S} $ i.e., if S becomes one-fourth then t will become half i.e., 2 sec
