A Level Maths Mechanics Year 2 Chapter 5: Mini test

WHAT IS FALSE about Friction?

• Acts against motion
• Can move an object
• Occurs on rough surfaces
• Friction is variable

The normal reaction...

• Depends on weight alone
• Always acts vertically
• Acts perpendicular to the plane
• Only acts on particles in contact with a surface

The vertical component of this force is

• 8
• 8sin40
• 8cos40
• 8tan40

Friction =

• Friction ≤ μR
• Friction = μR

Resolving in the direction of motion

• Weight = 2sinα
• Weight = 2cosα
• Weight = 2gsinα
• Weight = 2gcosα