Mechanics> friction...

A thin rod of length 1 m is fixed in a vertical position inside a train, which is moving horizontally with

constant 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 , 13 Years ago

Grade 11

1 Answers

Prajwal kr

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

Last Activity: 13 Years ago

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Mechanics> friction...

avinash saran , 13 Years ago

Prajwal kr

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