1.

re t is time in seconds) is applied at t 0 sec to the block of mass m placed on ae. The coefficient of static and kinetic friction between the block and surface areely. Which of the following graphs best represents the acceleration vs time of thetime in2. A force F 2t (wherecoefficirough horizontal surface.8.block. (>H)

Answer»

option D. is correct..because , until the frictional force is countered by the F = 2t, the block won't move.. and static friction will be there..

when the F exceeds the static friction value.

it will move with acceleration = F/m = 2t/m ,

here a ∞ t.. so straight line after it will be followed.



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