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3.3.21 Static and limiting equilibrium on a rough surface (A-level only)

Which direction does friction act relative to actual or impending motion?

A

It adjusts to the value required for equilibrium, up to μR\mu RμR.

B

When other forces have no vertical components and vertical acceleration is zero.

C

Opposite to the motion or tendency to move.

D

For general static equilibrium, friction satisfies F≤μR\boxed{F\le\mu R}F≤μR​; at limiting equilibrium, it satisfies F=μRF=\mu RF=μR.

3.3.21 Static and limiting equilibrium on a rough surface (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /3.3.21 Static and limiting equilibrium on a rough surface (A-level only)

Flashcards for OCR A Level Maths 3.3.21 Static and limiting equilibrium on a rough surface (A-level only), covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 20 cards, matched to the OCR A Level Maths (H240) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.