Math lecture 3

Question 1

What is on either side of the = sign

Answer 1

an answer with the same magniture, direction and units

Question 2

F = ma

Answer 2

To accelerate an object of mass m, we need force F

Question 3

Scalar

Answer 3

Just the number eg. speed

Question 4

Vector

Answer 4

Magnitude + direction eg displacement

In the scenario of a car moving in a circle, it has constant speed and is travelling distance but its displacement is 0 because it comes back to the same position (vectors cancel out)

Question 5

Vector addition

Answer 5

Just add the two vectors

Question 6

Vector subtraction

Answer 6

First vector + (inverse of the second). Draw a diagram

Question 7

How to find magnitude and direction of a vector

Answer 7

Any vector can be represented by two orthogonal vector components if there are multiple given vectors or vector is not in a right angled triangle.

Find the x components of the vectros
Find all the y

Find the x and the y, draw them out and then draw the vector (free tail to free head), find angle and magnitude of vector