Question

A dustbin of mass 12kg standing on a horizontal ground is pushed by a horizontal force of 40N. If the coefficient of static friction is 0.4, will the dustbin move?

Answer 1

Answer:

No dustbin will not move because value of friction force is more than applied force.

Explanation:

fiction force =uN=umg=0.4×120=48N

Fiction force greater than applied force so that dustbin will not move.

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Answer 2

Answer: The object will move.

Explanation:

[Refer to the attached image.]

The object will move only if the force (F) will be able to overcome the force of friction (f).

f = μMg

M = mass of the dustbin = 12 kg

g = acceleration due to gravity

μ = coefficient of friction

Now, max frictional force =  μMg = 0.4 x 12 x 10 = 48N

48 N > 40 N

F > f

Where,

f = force due to friction

F = applied external force

Therefore, the object will move.