Kinematics Question 217
Question: The time taken by a block of wood (initially at rest) to slide down a smooth inclined plane 9.8 m long (angle of inclination it’s $ 30^{o} $ ) it’s [JIPMER 1999]
Options:
A) $ \frac{1}{2}\sec $
B) 2 sec
C) 4 sec
D) 1 sec
Show Answer
Answer:
Correct Answer: B
Solution:
For one dimensional motion along a plane $ S=ut+\frac{1}{2}at^{2} $
$ \Rightarrow 9.8=O+\frac{1}{2} $
$ g\sin 30^{o}t^{2} $
therefore $ t=2\sec $
