Measurements and Vectors

Question 1

physical quantities

Answer 1

can be measured and consists of a magnitude and unit.

two types: base quantities, derived quantities

Question 2

symbol for mass, length, time

Answer 2

m, x, t

Question 3

Scalar

Answer 3

any quantity that has magnitude only (number value with units)

Question 4

Vector

Answer 4

any quantity that has magnitude and direction

Question 5

when two vectors point in the same direction…

Answer 5

addition

Question 6

When two vectors point in the opposite direction…

Answer 6

subtraction

Question 7

______ relates to the
size of the arrow and
________ relates to the
way the arrow is drawn

Answer 7

magnitude, direction

Question 8

vectors are always added _________ to ___________

Answer 8

head, tail

Question 9

when two vectors are perpendicular….

Answer 9

use pythagorean theorem. This will find the resultant

Question 10

how to find displacement

Answer 10

use soh cah toa to find the missing side or angle (direction) after you find the resultant (hypotenuse)

Question 11

Velocity

Answer 11

M⁰LT⁻¹

Question 12

Acceleration

Answer 12

M⁰LT⁻²

Question 13

Force

Answer 13

MLT⁻²

Question 14

Pressure

Answer 14

ML⁻¹T⁻²

Question 15

Energy

Answer 15

ML²T⁻²

Question 16

Work

Answer 16

ML²T⁻²

Question 17

Power

Answer 17

ML²T⁻³

Question 18

c =

Answer 18

square root of a squared plus b squared minus 2ab times cos (y)