LECTURE #2 - forces and vectors (2)

Question 1

what is a force ?

Answer 1

is a push or pull applied to an object that can cause it to accelerate, change its shape, or undergo other changes in motion

Question 2

how can force be calculated ?

Answer 2

F = m x a

Question 3

what is a vector ?

Answer 3

magnitude x direction

Question 4

what is resolution of vector ?

Answer 4

replacing a single vector with the perpendicular vectors such that the vector composition of the two perpendicular vectors yields the original vector

Question 5

what are the two methods of resolution of vectors ?

Answer 5

graphical and trigonometric

Question 6

does x = cos or sin ?

Answer 6

cos

Question 7

does y = cos or sin ?

Answer 7

sin

Question 8

what are the three sides during trigonometry ?

Answer 8

hypotenuse, opposite and adjacent ?

Question 9

what does the sum of 3 internal angels = ?

Answer 9

180 degrees

Question 10

what are triangle parts ?

Answer 10

3 angles and 3 sides

Question 11

what is sinθ ?

Answer 11

opposite / hypotenuse

Question 12

what is cosθ ?

Answer 12

adjacent / hypotenuse

Question 13

what is tanθ ?

Answer 13

opposite / adjacent

Question 14

what is the synonym for trigonometry ?

Answer 14

SOHCAHTOA

Question 15

if we know the length of the sides of a right triangle, what can we compute ?

Answer 15

the internal angles

Question 16

what do we use to find the internal angle ?

Answer 16

inverse of trigonometric properties (example: sin ^-1)

Question 17

what are the steps for vector composition ?

Answer 17

• resolve into horizontal and vertical components
• add all horizontal components
• add all vertical components
• calculate resultant vector