Question
Physics Question on laws of motion
Select the incorrect statement about friction:
A
Static friction force is always equal to μN, where μ is co-efficient of static friction and N is normal force.
B
Friction is a non-conservative force.
C
Friction arises from electro-magnetic force.
D
Friction always opposes relative motion between two surfaces.
E
Maximum value of static friction is μN, where μ is co-efficient of static friction N is normal force.
Answer
Static friction force is always equal to μN, where μ is co-efficient of static friction and N is normal force.
Explanation
Solution
The correct answer is (A):Static friction force is always equal to μN, where μ is co-efficient of static friction and N is normal force.