2. Types of Energy
Potential energy--stored energy
A stretched rubber band
Water behind a dam
Kinetic Energy--energy of motion
Car driving
An object falling to the ground
3. Work vs. energy Work=a force exerted over a distance
energy=ability to do work
Both have same units--Joules!
4. Accuracy and
Precision
Accuracy--how close the result is to the actual value
If real answer is 100 grams and the values are 105, 93,
102
Precision--if the results are consistent
If real answer is 100 grams and the values are 110,
111, 110.5
#1 and #2
5. Units Can be converted from one to another!
Gigameters to meters
Microliters to liters
Kilogram to microgram
#8
6. Practice Problems 1. Convert 534,000 m to km
534 km
1. Convert 330,000 nm to m
.00033 m
1. Convert 350,000 mg to kg
.35 kg
1. Convert 3 weeks to minutes
30,240 min
