A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friciton between the block and the cart is `mu`. The acceleration a of the cart that will prevent the block from falling statisfies.

Options

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

Answer

C