Week 2: Minimum Force Needed

BITSAT 2015 Tutorials › Question Of the Week questions › Week 2: Minimum Force Needed

What is the minimum force needed to move a block on the ground?

Hint: Answer is not μmg!

#Miscellaneous #Question Of the Week

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6 Answers

1

Arpan Banerjee ·2009-03-21 08:15:06

Answer wiil be a value less than Î¼mg.
This is because if the force is applied at an angle Î¸,then the vertical component of the force will to some extent minimise the weight mg of the body thus reducing the normal reaction and hence the friction.

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1

Arpan Banerjee ·2009-03-22 01:12:19

Is the answer correct

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Lokesh Verma ·2009-03-22 07:27:13

Good work guys..

can someone of you post the final answer?

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Arpan Banerjee ·2009-03-24 00:42:50

Sorry Sir need to upload an image to clarify it properly.Update the "Upload Image" tab in the above menu.It is not working

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1

Kartik Sondhi ·2009-04-30 03:50:16

tan Î¸ =Î¼.
therefore sin Î¸ = Î¼/Î¼²+1
minimum force is equal to mg*sin Î¸=mg Î¼/Î¼²+1

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Ankit Gupta ·2009-05-11 11:56:13

can u plz put up a diagram 2 show dis????

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Your Answer

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