Physics
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/34
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
35 Terms
What are vectors?
Quantities that contain magnitude AND direction (e.g. 5m/s North)
What are scalars?
Quantities that contain just magnitude (e.g. 5m/s)
How can vectors be symbolised?
F ˜F →F
How do you draw vector arrows?
What is distance?
The total length of the path travelled
What is displacement?
The shortest straight-line change in position from start to finish
How do you find distance?
Add path lengths
How do you find displacement
Find the magnitude of the quickest path (as well as direction)
How do you find average speed
DISTANCE CHANGE
How do you find average velocity?
DISPLACEMENT CHANGE
What does the gradient in a distance-time graph represent?
Speed
What does a negative gradient in a distance-time graph represent?
Returning/Going backward
How do you calculate velocity on a time-distance graph
Find the gradient
How do you calculate displacement on a velocity-time graph
Find the area underneath the curve
How do you calculate acceleration on a velocity-time graph
Find the gradient
How do you calculate acceleration?
How do you calculate displacement when something is dropped (gravity)?
What differences are there in the gravity/displacement formula when something is thrown upward
Acceleration is -9.8 m/s, initial velocity stays positive
What is the formula for Newton’s Second Law
What is Earth’s Gravity?
9.8m/s2
What does it mean for acceleration when something is moving at a constant speed?
a=0
Formula for frictional force?
Ff=Fa-Fnet
Steps to find frictional force?
Use Ff=Fa-Fnet
Determine Fa, m, a
Use F=ma to determine net force
Is momentum a scalar or a vector
Vector
What is the formula for momentum
p=mv
How do you find the total momentum of a system?
Find the total momentum of all objects and add together.
How do you find total change in momentum?
Use p=mv for different values, and find the difference.
How do you find impulse?
∆p=Ft
How do you determine impulse on a Force-time graph
Area under the curve
What is the law of conservation of mass?
That the amount of momentum in a system is always the same
What are elastic collisions?
When objects collide and bounce off of each other
What are inelastic collisions
When objects collide and remain bounded
What is work?
It is the force multiplied by the distance moved in the direction of force