Show:
Motion & Speed
Distance-Time Graphs
Energy: Kinetic or Potential?
Conservation of Energy
100
change in position over time.
What is motion?
100
a flat line on a distance-time graph shows ___________.
What is no motion?
100
Walking down the street
What is kinetic energy?
100
State the law of conservation of energy.
Energy can not be created nor destroyed. It can only be transformed into other forms of energy
200
Change in position can be identified by comparing the object to ______________.
What is a reference point?
200

What is the difference between forward and backward motion on a distance vs. time graph?

The direction of the line. Moving forward shows distance increasing, while moving backward shows distance decreasing.

200
a stretched rubber band
What is potential energy?
200
How can you decrease the potential energy of a book on a shelf?
Lower the book.
300
Speed can be calculated using the equation ___________.
What is s=d/t?
300

How does a graph show changes in speed?

By changes in the slope of the line.

300
A mouse running away from a cat
What is kinetic energy?
300
Describe the energy transformation that occurs as you throw an object upward.
Kinetic energy changes into gravitational potential energy.
400
Calculate the speed of an object that travels 280 m in 4 mins.
What is 70 m/min?
400

If two lines on a graph have different slopes, how do you know which line represents the faster object?

The line with the steeper slope is faster.

400
An archer with his bow drawn
What is potential energy?
400
Describe the energy transformation occurring as a car travels down a hill
Gravitational potential energy is transformed into kinetic energy.
500
m/h (mph), km/h, m/s
What are units of speed?
500

What happens on a distance-time graph when one line crosses another?

One object passes the other.

500
a bee flying past your head
Both/Either
500
How does mechanical energy relate to the conservation of energy?
The law of conservation of energy requires that total energy, or mechanical energy, stays the same