Speed Flashcards
What is the difference between distance and displacement?
Distance is a Scalar quantity and only has a magnitude (size).
Displacement is a Vector quantity and has both magnitude and direction.
What is the difference between Speed and Velocity?
Speed is a Scalar quantity and only has magnitude (size).
Velocity is a Vector quantity and has both magnitude and direction.
What factors can affect the speed at which someone walks, runs or cycles?
Age, fitness, terrain and distance travelled.
What are typical speeds for a person walking, running and cycling?
1.5 m/s
3.0 m/s
6.0 m/s
What are typical speeds of a car and a train?
13-30 m/s and 50 m/s
What is the typical speed for sound travelling in air?
330 m/s
What is acceleration?
Chance in velocity of an object per second.
What is the unit of acceleration?
m/s2
How can an object be accelerating even if it is travelling at a steady speed?
If it is changing direction.
What is happening to an object if it has a negative acceleration?
It is slowing down.
What information does the gradient of the line in a distance-time graph provide?
Speed
What information does the gradient of the line in a velocity-time graph provide?
Acceleration
How can the distance traveled by an object be found in a velocity-time graph?
Calculate the area under the graph (line)
What is the name for the steady speed a falling object reaches when the resistive force is equal to its weight?
Terminal Velocity
What is the general name for the frictional forces an object experiences when moving through a fluid (liquid or gas)?
Drag
