Quiz 7 Flashcards
What is reaction time?
The time between seeing a hazard in the road and responding to it?
What type of quantity is distance?
Scalar
what is instantaneous speed?
The speed at a specific moment
What does a straight line(not horizontal) on a distance-time graph show?
Constant speed
Name the 2 types of event covered by the conservation of momentum
Collisions and explosions
What symbol is used instead of writing the word speed?
V
What 3 changes are considered acceleration in physics?
Speeding up,slowing down and changing direction
What symbl is used for distance?
s
Which of newtons laws explains why momentum is conserved
Newtons 3rd law
What does the word decelerating mean?
Slowing down
State the equation linking acceleration
Change in velocity and time taken in words
Change in velocity= acceleration x time
What symbol
Is used instead of writing the word momentum?
P
What is the resultant force at terminal
velocity?
Zero
State the unit of dostance
Metres or m
What symbol is used instead of writing the word acceleration?
a
What does a curved line becoming steeper on a distance-time graph show?
Speeding up
What does this symbol mean:~
Approximate value
How do you calculate average velocity?
Displacement divided by total time
How do you calculate the speed from a distance-time graph if the line isn’t straight?
Draw a tangent and find the gradient of the tangent
State the equation used for newtons 2nd law in worss
Resultant force= mass x acceleration
What equation links velocity,displacement and time
V=s/t
what equation links velocity,displacement and time
Velocity= displacement/time
