1.

Determine the maximum acceleration of the train in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train’s floor is 0.15.

Answer»

Solution :DUE tostaticfrictionblockwill getacceleration
`:. Ma= f_(s)`
and `N = mg`
Fromequation( 1)
`ma LE mu_(s) mg`
`:. , a lemu_(s) g`
`a_(max)= mu_(s ) g`
`= 0.15 xx 10`
`:. , a_(max)= 1.5 MS^(-2)`


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