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Question

A small block is released from rest inside a cylinderical [fixed] pipe of radius R = 3m as shown in the figure. Speed of the block when it reaches B from A is (coefficient of friction between block & cylinder is μ=0.7 and g=10 m/s2). Write the answer until two digits after the decimal point.

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Solution


By work energy theorem /mgRμ/mgR=12/mv2
gR(1μ)=v22
v=2gR(1μ)=2×10×3(10.7)
v=32=4.242m/s

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