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A block of mass 2kg is at rest on horizontal floor of a truck. The coefficient of static friction between the block and floor is 0.7. If the truck starts to move with a horizontal acceleration of 4 m/s^2, the frictional force on the block is?(if g=10m/s^2) a)0N b)4N c)8N d)14N Plz explain..

A block of mass 2kg is at rest on horizontal floor of a truck.


The coefficient of static friction between the block and floor is 0.7.


If the truck starts to move with a horizontal acceleration of 4 m/s^2, the frictional force on the block is?(if g=10m/s^2)


a)0N


b)4N


c)8N


d)14N


Plz explain..

Grade:12

2 Answers

dvm srikant
39 Points
10 years ago

because frictional force f=u mg where u=coeff of static fric and f=0.7*2*10 =14 n

kaushal shah
9 Points
10 years ago

since it is not moving on the floor of truck

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