Topic 5a - force basics (1. contact and non-contact forces)

Question 1

what is a vector quantity

Answer 1

have magnitude (size) and direction.g. force, velocity, displacement

Question 2

what are scalar quantities

Answer 2

only has magnitude e.g, speed, distance, mass

Question 3

how are vectors represented

Answer 3

by an arrow

Question 4

what is a contact force

Answer 4

2 objects have to be touching for a force to act e.g, friction, air resistance, tension in ropes

Question 5

what is a non-contact force

Answer 5

objects that do not need to touch in order for the force to act e.g, magnetic forces, gravitational forces