M1 Kinematics Flashcards
acceleration
the rate of change of velocity with time
- vector quantity
acceleration due to gravity (g)
the acceleration of an object freely falling when there is no air resistance
- near the surface of the Earth is 9.8m/s/s
air resistance
friction acting on an object moving through air
average acceleration
the acceleration of an object measured over a time interval
average velocity
the velocity of an object measured over a time interval
collinear
points that lie on the same straight line
components of a vector
two vectors which act at right angles,
the vector sum of which is the original vector
deceleration
decrease in the velocity of an object
displacement
change of position in a particular direction
- vector quantity
distance
the length moved between two points
final velocity (v)
the velocity an object has at the end of a time interval
free fall
motion only under the influence of a gravitational field
friction
an opposing force that acts in the opposite direction to an object’s motion
initial velocity (u)
the velocity an object has at the beginning of a time interval
kinematics
the study of how motion occurs (including distance, displacement, speed, velocity, acceleration and time without considering what causes the motion)
rectilinear motion
motion in a straight line
SI system
the international system of units
- ampere, kelvin, kilogram, metre, mole, second and candela
speed
ratio of distance to time
uniform
not changing, constant
variables
quantities that can change
velocity
ratio of displacement to time
- vector quantity
velocity-time graph
- gradient of graph is acceleration
- area under the graph is displacement
3 equations of motion
s = ut + 1/2 at²
v = u + at
v² = u² + 2as
adding vectors?
resultant is from tail of first to head of second
relative velocity?
Vₐ ᵣₑₗₐₜᵢᵥₑ ₜₒ B = Vₐ - Vb