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Classical Mechanics Level 2

A red block is pressed against a frictionless blue wall as shown. Is it possible to keep the block in an equilibrium position?

No Yes

Dinesh Nath Goswami by Dinesh Nath Goswami , 20, India

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2 solutions

Horizontal force is balanced but the vertical weight is unbalanced. If there was sufficient friction then it could have been balanced.

8 Helpful 0 Interesting 0 Brilliant 0 Confused
Andreas Louk
Jul 19, 2015

The only force that could keep the red block in equilibrium position is the friction force which is in the opposite direction of the gravitational force. Since the red block and the blue wall is frictionless, then we will never have an equilibrium position for the red block.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

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