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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..
because frictional force f=u mg where u=coeff of static fric and f=0.7*2*10 =14 n
0
since it is not moving on the floor of truck
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