A man of mass 65 kg. is standing stationary with respect to a conveyor belt which is accelaccelerating with 1m / s² . If ${\mathrm{\mu }}_{\mathrm{s}}$ is 0.2, the net force on the man and the maximum acceleration of the belt so that the man is stationary relative to the belt are (g =10m / s² )

• A

  zero, 2m / s²

• B

  65N, 2m / s²

• C

  zero, 1m / s²

• D

  65N,1m / s²