Kinematics Question 733

Question: A boy on a cycle pedals around a circle of 20 metres radius at a speed of 20metres/sec. The combined mass of the boy and the cycle is 90 kg. The angle that the cycle makes with the vertical so that it may not fall it’s (g=9.8m/sec2) [MP PMT 1995]

Options:

A) 60.25o

B)63.90o

C) 26.12o

D)30.00o

Show Answer

Answer:

Correct Answer: B

Solution:

tanθ=v2rg=40020×9.8

therefore θ=63.9



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