The minimum acceleration that must be impprted to the cart in the figure so that the block `A` will not fall (given `mu` is the coefficient if friction between the surface of block and cart) is given by:

Options

A. `a lt (g)/(mu)`
B. `a gt (mg)/(mu)`
C. `a lt (g)/(mu m)`
D. `a ge (g)/(mu)`

Answer

D

Explanation

`n = ma`
`f_(max) = mu N = mu ma`
`mu ma ge mg`
`a ge (g)/(mu)`