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scalar and vectors

scalar and vectors

Assessment

Presentation

Physics

12th Grade

Practice Problem

Easy

Created by

Jessie DeLeon

Used 66+ times

FREE Resource

7 Slides • 14 Questions

1

scalars and vectors

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2

Objectives

  • differentiate scalar quantity from vector quantity

  • list examples of vectors

  • perform addition of vectors

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3

Poll

It is a physical quantity that has magnitude.

scalar

velocity

distance

vector

4

Poll

It is a physical quantity that has a magnitude and direction.

scalar

velocity

distance

vector

5

Poll

Siri walks in a forest 10m east and and goes back 4 m west. What is the total distance traveled by Siri?

4 m

6 m

10 m

14 m

6

Poll

Which of the following is NOT an example of vector quantity?

30 m/s, North

4 N, west

4 meters at 350

35 minutes

7

Poll

What is the resultant vector of displacement 100 m, east and 25 m, west?

75 m, west

75 m, east

125 m, west

125 m, east

8

Open Ended

What is scalar quantity?

9

Open Ended

what is vector quantity?

10

Poll

Question image

Determine what physical quantity is this.

scalar

vector

11

Poll

Question image

Determine what physical quantity is this.

scalar

vector

12

Poll

Question image

Determine what physical quantity is this.scalar

scalar

vector

13

Poll

Question image

Determine what physical quantity is this.

scalar

vector

14

Poll

Question image

Determine what physical quantity is this.

scalar

vector

15

Open Ended

Will you give some examples of scalar and vector quantities aside from what we have earlier.

16

How to add vector quantities?

  • graphical method

  • mathematical method

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17

graphical method

  • head-to-tail method

  • parallelogram method

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18

head-to-tail method

  • The head-to-tail method of adding vectors involves drawing the first vector on a graph and then placing the tail of each subsequent vector at the head of the previous vector.

  • The resultant vector is then drawn from the tail of the first vector to the head of the final vector.

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19

parallelogram method

  • link vectors tai-to-tail

  • draw the resulting parallelogram

  • the resultant vector A + B, bisects the parallelogram as shown.

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20

algebraic or mathematical method

  • use Pythagorean theorem in solving resultant vector

  •  R = a2 + b2R\ =\ \sqrt{a^2\ +\ b^2}  

  • in determining the direction of the vector use equation  θ = tan1 ba\theta\ =\ \tan^{-1}\ \frac{b}{a}  

21

Open Ended

Solve for the resultant vector of the following.
a = 60 m at 30°30\degree  
b = 30 m at  55°55\degree  
Find

 Σx\Sigma x   Σy\Sigma y   R R\    θ\theta  

scalars and vectors

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