The forces of friction causes:
Correct answer: A. Excitations
- A. Excitations
- B. De-excitations
- C. Magnetization
- D. None of these
Explanation
Option: A The combination of velocity-dependent friction and variable normal force can lead to parametrically excited instability. Due to the coupling of the oscillating normal force and the velocity-dependent friction, a parametric damping term arises in the equations of motion in the transverse direction. Friction can slow things down and stop stationary things from moving. In a frictionless world, more objects would be sliding about, clothes and shoes would be difficult to keep on and it would be very difficult for people or cars to get moving or change direction. Option B : Friction causes excitations but it doesn't cause de-excitation. Option C : Friction doesn't cause magnetization.
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