Energy
A rollercoaster at the top of the hill (before the drop) has this type of energy
Potential Energy
What is the formula to find speed?
S= D/T
What is mechanical energy?
combination of potential and kinetic energy
It took a car 2 hours to drive 60 miles. What was the cars speed? Must include the units.
30 mph
What are the two types of observations we have learned about?
Qualitative and Quantitative
A ball moving is what type of energy?
Kinetic Energy
What are two things we need to measure speed?
A ruler and a stopwatch
what is the example of mechanical energy that we showed in class?
a wind up toy!
If you move 50 meters in 10 seconds, what is your speed?
5 m/s
What is an inference?
Conclusions or deductions based on observations.
Batteries and food has this type of potential energy.
Chemical Energy
What goes on the X axis of a distance/time graph?
Time!
True or false: Potential energy will never turn into kinetic energy.
False, potential energy can turn into kinetic energy and kinetic energy can turn into potential energy
You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?
2 m/s
True or False: Qualitative uses numbers only (measurements, counting etc)
False: quantitative uses numbers only.
Name the 3 types of Energy we have learned about so far.
Kinetic, Potential and Mechanical
What goes on the Y axis of a distance/time graph?
Distance
What type of energy is used in the following example: An archer with her bow drawn.
Potential Energy
A plane travels 395,000 meters in 9000 seconds. What was its speed?
43.8(repeating) or 43.9
What are the 3 types of variables?
Independent, dependent and controlled (constant)
What is a closed system?
A system that does not allow transfer of matter in and out of the system!
What do the following lines represent?
straight line:
straight diagonal line:
curved line:
Straight line: at rest
straight diagonal line: constant speed
curved line: acceleration or deceleration
What does the law of conservation of energy state?
Energy is neither created nor destroyed in a closed system.
It took somebody (at a constant speed) 4 hours to bike 15 miles. Calculate? Nah, graph it instead.
Draw a graph!
What is the difference between an investigation and an experiment?
experiment is a scientific test using
investigation is a process of finding the answer to a question using various research methods