CHAPTER 2 PHYSICS Flashcards
What is distance?
the total length travelled.
What is displacement?
the shortest distance between the start & end point.
What is the SI unit for distance & displacement?
m
What is the SI unit for speed & velocity?
m/s
Formula for speed
distance/time
Formula for velocity
displacement/time
How to answer ticker tape question?
the object is moving at (constant/ increasing. decreasing) speed.
SI unit for ticker tapes
s
How to find total time of ticker tape?
total time= seconds x no. of ticks.
first tick is not counted as t=0
What is acceleration?
the rate of change in speed/ velocity in one second.
SI unit for acceleration
m/s(2)
State the formula for acceleration
final speed-initial speed/time
How to write deacceleration answer?
dont write ‘-‘ in the answer even though its a negative number but instead write ‘deaccelerates’ instead of ‘accelerates’.
What is the SI unit for average speed?
m/s
How to find average speed?
total distance/total time
SI unit of distance time graph
m/s
Formula for distance time graph
distance/time
distance time graph:
- steep=???
- less steep=???
- steep= increasing velocity.
- less steep= decreasing velocity.
SI unit of speed time graph
m/s(2)
How to calculate distance for speed time graph?
calculate the bottom area of the graph.
How to calculate the bottom area of speed time graph if the bottom area is a triangle?
area of triangle= 1/2 x b x h.
How to calculate the bottom area of speed time graph if the bottom area is a rectangle/square?
area of rectangle/square= b x h.
speed time graph:
- steep=???
- less steep=???
- steep= increasing acceleration.
- less steep= decreasing acceleration.
Do you need to calculate the speed in distance time graph?
no.
How much is the acceleration in a vacuum?
10m/s(2)
What is free fall?
a vacuum.
If air resistance can be ignored on earth, how much is the acceleration?
10m/s(2)
