Scalars And Vectors 1.2

Question 1

Define a scalar and give 3 examples

Answer 1

Defined by a magnitude and a unit
Distance
Speed
Mass

Question 2

Define a vector and give 3 examples

Answer 2

Defined by a magnitude, unit and a direction
Displacement
Velocity
Force

Question 3

What happens to velocity when it is squared?

Answer 3

It turns into a scalar

Question 4

When resolving vectors, which axis do you apply ‘chains’ to?

Answer 4

The axis that is closest to the force

Question 5

What does coplanar mean?

Answer 5

Forces are restricted to a 2D plane

Question 6

How do you calculate the resultant of 2 or more vectors?

Answer 6

Place them in an order, considering their direction, then draw a line from the start to the end
(Pythagoras’ theorem will be useful)

Question 7

When calculating the resultant of vectors what must you not forget to do?

Answer 7

Label the resultant with an arrow and a symbol

Question 8

What 2 criteria must hold true for a structure that is static?

Answer 8

Summation of M = 0
Fr = 0