Physics-
General
Easy
Question
PQ is a smooth inclined plane whose angle of inclination 
can be varied in such a way that point Q remains fixed & P can move on a vertical line PR. A particle slides from rest from point P. At different values of time for descent td from P to Q is noted. The following statement is true about td:
- minimum value of
- td is minimum when approaches 90°
- td decreases continuously as is increased.
- td first increases then decreases as is increased
approaches 90°
is increased.
is increased
The correct answer is: td is minimum when approaches 90°
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