Forces

Question 1

Describe scalar

Answer 1

Mass temp speed time
Magnitude only

Question 2

Vector

Answer 2

Magnitude and direction
Weight force velocity

Question 3

How do loudspeakers and headphones work

Answer 3

• cone has coil of wire around one end
• wire connected to alternating current electrical supply
• permanent magnet goes inside coil of wire
• as current passes it generates magnetic field
  = interacts with field of magnet
• produces resultant force which causes cone to move
  = generate sound waves