A body of mass 2 Kg is kept by pressure to a vertical wall by a force of 100 N .The coefficent of friction between the wall and body is 0.3 .then the frictional force is ???
Answers
Answer:
Static friction is the force that keeps the object at rest. It must be overcome to start moving the object. If a small amount of force is applied to an object, the static friction has an equal magnitude in the opposite direction.
Coefficient of friction (μ)=0.3
Normal force=100N
So, f max
(Maximum friction force)=100×0.3
=30N
Force trying to produce motion =mg=2×10=20N
So, frictional force =20N
Given:
Mass = 2kg
Force = 100 N
Coefficient of friction (μ) = 0.3
To Find:
Frictional force (f) = ?
Solution:
Downward force or the weight of the given body
⇒ m * g = 2 * 9.8 = 19.6 N
Frictional force which is acting on the body
⇒ f = 19.6 * 0.3 = 5.88 N
Since the force is lesser than the applied force hence the frictional force
∵ (5.8 N < 19.6 N)
Therefore,
19.6 N ≈ 20 N