Motion, Mass and Weight Flashcards
Fourth Kinematics Formula
s = 1/2 (u + v)t
s = displacement
u = initial velocity
v = final velocity
t = time
Flatline on distance - time graph:
Means AT REST
Distance no move so remain flat lah
Define DENSITY:
The mass per unit volume of a material
Increased air resistance = ?
Reduced acceleration
Flatline on speed - time graph
Means at CONSTANT SPEED
Speed no increase or decrease so remain flat lah
Formula for Density?
p = m/v
p = density
m = mass
v = volume
What does speed - time graph represent
Acceleration
If two people are walking with the same speed in different directions will their velocity be the same?
HELL NO!!!! Because velocity includes direction and they are walking in a different direction
Third Kinematics Formula:
v² = u² + 2as
v = final velocity
u = initial velocity
a = acceleration
s = displacement
First Kinematics Formula:
v = u + at
v = final velocity
u = initial velocity
a = acceleration
t = time
Define SPEED:
Rate of change of distance
Define FREE FALL:
When gravity is the only force acting on an object, and the condition is perfectly obtained in a vacuum
What is ze formula for Weight?
W = mg where g is gravitational acceleration
(Gravitational acceleration on earth is
9.8m/s²)
Mass vs Weight
Mass is the amount of matter in an object (KG)
Weight is the effect of gravitational field on mass (N)
What does distance - time graph represent
Speed
