Measurements Used In Linear Motion Flashcards
What are scalar quantities?
When measurements are described in terms of just their size or magnitude.
Direction is not taken into account.
What are types scalar quantities?
Speed
Distance
Mass
Temperature
What is speed?
The rate of change of position.
How can speed be calculated?
Speed (m/s) = distance covered (m)/time taken (s)
What is distance?
The length of the path a body follows when moving from one position to another.
What’s an example of distance?
A 200m runner who has just completed a race has run a distance of 200m.
What’s the triangle to calculate speed and distance?
Distance = speed x time Speed = distance/time
What’s an example of the triangle calculation?
To calculate the speed of a sprinter running the 100m in 12 seconds.
Speed = distance/time 100/12 = 8.3 m/s
What’s another example of the triangle calculation?
An A-level PE student who runs for 30 minutes and covers 5.5km
Calculate the speed the student ran:
30minutes = 0.5hours
5.5/0.5 = 11km/hr
Explain a speed/distance graph?
Stationary = line on the graph is horizontal.
Running at a steady speed in a straight line = line of the graph remains straight but is now angled.
Steeper line = faster the speed.
What is mass?
Quality of matter a body possess (Kg)
What are vector quantities?
Measurements described in terms of size and direction
What are types of vector quantities?
Weight Acceleration Acceleration Displacement Velocity Momentum
What is weight?
Gravitational fore exerted on an object (Newtowns)
What’s an equation for weight?
= mass (Kg) X gravitational field strength (N/Kg)
