Methods: Velocity/Energy/Graphs

Question 1

Velocity

Answer 1

Speed with direction. ( average velocity=distance (d)/time (t), direction)

Question 2

Instantaneous velocity

Answer 2

Speed of object at one moment

Question 3

Acceleration

Answer 3

Change in velocity (speed or direction)

Question 4

Average velocity

Answer 4

Average speed and direction of starting and ending points of motion

Question 5

Energy

Answer 5

The ability to do work

Question 6

Law of conservation of energy

Answer 6

Energy in a closed system cannot be created or distroyed

Question 7

Kinetic energy

Answer 7

Form of mechanical energy, movement energy
KE= 1/2mv^2

Question 8

Potential energy

Answer 8

Form of mechanical energy, stored energy
Gravitational Potential energy (GPE)= mgh
Mass * gravitational acceleration * height
Gravitational potential energy = 9.81 m/s/s on Earth

Question 9

Total Energy

Answer 9

All energy in a system (kinetic+potential+elastic+etc)

Question 10

Joule

Answer 10

Unit of energy (use kg and m to calculate)

Question 11

Accuracy

Answer 11

Closeness to true value

Question 12

Precision

Answer 12

Consistency of getting result

Question 13

Variation

Answer 13

Lowest number in data to highest

Question 14

Range

Answer 14

Difference between lowest and highest numbers in data set

Question 15

Experimental error

Answer 15

Mistake Unavoidable based on tools given that will affect data (ex. Tool not precise enough)

Question 16

Blunder

Answer 16

Human mistake that affects data (could be in design or execution of experiment)

Question 17

Error % and interpretation

Answer 17

Percent experimental value got off from true/accepted value
Know true: |true-exp./true|* 100
Average: |diff of 2 #s/their average|*100

Question 18

What are the Metric prefixes?

Answer 18

They multiply base by power of ten, MOST IMPORTANT:
Kilo= base1000
-None-= base1
Centi=base/100
Milli=base/1000