Motion and Energy Flashcards
Memorization (16 cards)
What is the speed at a particular point in time called?
Instantaneous speed
What is the overall speed over a long distance referred to as?
Average speed
How is acceleration defined?
Change in speed over time
What is the unit for acceleration?
Distance/time/time (e.g. km/h/s, m/s/s)
What does distance measure?
How far an object travels
What units can distance be measured in?
m, cm, km, etc
Is distance a scalar or vector quantity?
Scalar quantity
What does displacement measure?
The difference between an object’s final position and initial position
Is displacement a scalar or vector quantity?
Vector quantity
What is speed a measure of?
The rate at which an object moves over a distance
What is the Doppler effect?
The change in frequency of a wave in relation to an observer moving relative to the source of the wave.
The Doppler effect is commonly observed in sound waves, but it can also apply to electromagnetic waves, such as light.
How can the speed of a car be calculated using the Doppler effect?
By reflecting a beam and analyzing the change in frequency.
This principle is utilized in radar technology for speed detection.
What is the acceleration due to gravity?
9.8 m/s²
What is the friction between the air and a falling body called?
Air resistance
What does the slope or gradient in a distance-time graph represent?
The object’s average speed over a time interval
What is displacement?
Displacement is a measurement of the change in position of a moving body
Displacement is a vector quantity, meaning it has both magnitude and direction.
