Quiz 5 Flashcards
State a typical value of speed for a plane
250m/s
What does a horizontal line along the x-axis on a velocity time graph show?
No motion
Or stationary
If an object is stationary and there is a resultant force of 0N acting on it, what does the object do?
Remains stationary
What symbol is used instead of writing time?
t
What is inertia?
The tendency of objects to continue in their state of rest or uniform motion
State the typical value or speed for a train
27m/s
What is displacement?
Physics quantity which shows how far an object is from its starting point, including direction
What is velocity?
A quantity which shows the rate of change of displacement
What type of quantity is momentum?
Vector
What is newtons 3rd law?
The force of object A on object B is equal and opposite to the force of object B on object A
How does speed affect air resistance?
As speed increases, air resistance increases
Define the conservation of momentum
In a closed system, the total momentum before an event= the total momentum after the event
What causes acceleration?
Resultant force
Complete this law: whenever two objects interact, the forces they exert on each other are
Equal and opposite
State the equation linking
acceleration, change in velocity and time taken in words
Change in velocity= acceleration x time taken
How do you calculate average speed?
Total distance divided by total time
Complete this sentence: The less steep the line on a velocity time graph is
The smaller the acceleration
Define stopping distance
Thinking distance+ braking distance
When an objects velocity and acceleration are in the same direction, what happens to the objects motion?
It speeds up
State the relationship between acceleration and mass when resultant force is constant
Inversely proportional
