SATHEE: Gravitation Question 222

Gravitation Question 222

Question: A rectangular block of size $[10 c m \times 8 c m \times 5 c m]$ is kept in three different positions P, Q and R in turn as . In each case, the shaded area is rigidly fixed and a definite force F is applied tangentially to the opposite face to deform the block. The displacement of the upper face will be

Options:

A) Same in all the three cases

B)Maximum in $[P]$ position

C)Maximum in $[Q]$ position

D)Maximum in $[R]$ position

Show Answer

Answer:

Correct Answer: D

Solution:

$[η = \frac{F / A}{x / L} \Rightarrow x = \frac{L}{η} \times \frac{F}{A}]$ In $[η]$ and F are constant, then $[x \propto \frac{L}{A}]$ For maximum displacement, area at which force applied should be minimum and vertical side should be maximum. This is given in the R position of rectangular block.

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Gravitation Question 222

Question: A rectangular block of size [10cm×8cm×5cm] is kept in three different positions P, Q and R in turn as . In each case, the shaded area is rigidly fixed and a definite force F is applied tangentially to the opposite face to deform the block. The displacement of the upper face will be

Options:

Answer:

Solution:

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