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A thin rod of length 1 m is fixed in a vertical position inside a train, which is moving horizontally withconstant acceleration 4 m/s2. A bead can slide on the rod, and friction coefficient between them is 1/2.If the bead is released from rest at the top of the rod, find the time when it will reach at the bottom.

avinash saran , 11 Years ago
Grade 11
anser 1 Answers
Prajwal kr

Last Activity: 11 Years ago

If mass of bead is m;

mg-µN=ma

 

Now, N=pseudo force due to acceleration of train, which is equal to 4m Newton.

 

=>   mg-µ(4m)=ma

=>  g-4µ=a

=>  a=8ms-2

 

Using, second equation of motion:

1=0.5(8)t2

T=0.5sec

 

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