Physics: Engineering Mechanics I Chapters 1, 2, 3 1.

Physics:Engineering Mechanics I

Chapters 1, 2, 3

1

Units

• SILength Mass Time

• U.S. CustomaryLength Mass Time

2

Weight and Mass (US units)!?!?!

• Force (lbf)

• Mass (lbm, slugs)

3

Unit Conversion Example

• Convert kg m2/s2 to U.S. Customary units

4

5

Chapter 3 - Vectors

6

7

b =7 i + 3 j

7 i

3 j

8

9

Chapter 2 –Motion Along a Straight Line

10

Motion – intro

• position

• displacement

11

speed

velocity

12

• Averagevelocity

• Instantaneousvelocity

13

Position x

Velocity v

Acceleration a

14

• Averagevelocity

• Instantaneousvelocity

acceleration

acceleration

15

Constant Acceleration

Method 1

16

17

Method 2

18

Method 3