Motion and Force Flashcards
Examples of scalar vs vector
Scalar - temperature, mass, time, speed, distance
Vector - velocity, force, momentum, displacement
How do you add and subtract vectors
Add using tip to tail method and subtract just use the opposite of the vector you’re subtracting
Velocity =
Displacement/time
Acceleration =
Change in velocity / change in time
What is the acceleration of gravity
10m/s2 down
Slope =
Rise over run
Y/x
What is the slope on a displacement vs time graph and how are the different lines interpreted
Slope = velocity
Straight line across = constant velocity
Vertical Line = standing still
Curved line = acceleration
What is the slope on a velocity vs time graph and describe how the different lines are interpreted
Slope = acceleration
Vertical line = constant velocity
Vertical line along x axis - standing still
Straight line across = acceleration
How do you find displacement in a velocity vs time graph
Area
Projectile motions is symmetrical what does this mean
Takes the same amount of time to go up to a height as it does to fall down
The angle will also be the same
What can cause greater air resistance when an object is projectile
Surface area NOT MASS
What is Newton’s first law
Any object at rest or moving at a constant velocity will continue unless acted on by an external net force
Therefore net forces = 0 when velocity is constant
What is Newton’s second law , how is mass related
If there is a net force acting on an object the acceleration is proportional to that force
The bigger the mass the harder it is to accelerate
Equation for Newton’s second law
F = ma
What is Newton’s third law
If object A exerts a force on object B then object B exerts and equal and opposite force on object A
