railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mechanics Equilibrium and Friction Friction
Which of the following statements is/are true with respect to the force of friction between two bodies in contact?
I. It depends on area of their contact
II. It depends on relative velocity between them
III. Is always tangential to surface of their contact
1
Only III is true
2
Both I and III are true
3
Only II is true
4
Both II and III are true