A block of mass 20 kg is placed on a horizontal surface, co-efficient of static friction and co-efficient of kinematic friction between the block and surface are 0.5 and 0.4 respectively. What is the minimum force required to be applied on the block in the horizontal direction so that the block just starts to move? Consider g = 10 m/sec2

A block of mass 20 kg is placed on a horizontal surface, co-efficient

1.	A block of mass 20 kg is placed on a horizontal surface, co-efficient of static friction and co-efficient of kinematic friction between the block and surface are 0.5 and 0.4 respectively. What is the minimum force required to be applied on the block in the horizontal direction so that the block just starts to move? Consider g = 10 m/sec2
A.	200 N
B.	50 N
C.	100 N
D.	80 N
Answer» D. 80 N

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