What is the accleration of the block and trolly system as the fig., if the coefficient of kinetic friction between the trolly and the surface is 0.04 ? Also Calculate friction in the string. Take g=10"m/s"^2, mass of the string is negligible.

What is the accleration of the block and trolly system as the fig., if

1.	What is the accleration of the block and trolly system as the fig., if the coefficient of kinetic friction between the trolly and the surface is 0.04 ? Also Calculate friction in the string. Take g=10"m/s"^2, mass of the string is negligible.
Answer» Solution :Free body diagram of the block 30-T=3a ........(i) Free body diagram of the trolley Where `f_(k)=mu_(k) N=0.04 xx 20 xx 10=8N` SOLVING (i) & (ii), `a=0.96 m//s^(2) and T=27.2N`