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 $



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