forces and motion Flashcards
average speed =
measurement=
distance moved / time taken
m/s
Velocity is a
speed in a defined direction
acceleration =
a =
change in velocity / time taken
v-u / t
distance travelled (velocity-time graph)
Area under the graph
v^2 =
u^2 + 2as
resultant force
When a system of forces is acting on an object, the difference between the forces is called the Resultant force.
Or all the forces added if in same direction
newton first law
when the resultant force acting on an object is zero, the forces are balance and the object does not accelerate.
Acceleration is proportional to
resultant force
acceleration is inversely proportional to
Mass
F =
MA
acceleration measured in
m / s^2
Weight =
W =
mass x gravitational field strength
mg
Thinking distance =
reaction time x speed
Hooke’s law
Force =
F =
spring constant x extension
k x e
Spring constant measurement
Extension measurement
N / m
M
