GEN PHY Flashcards
refers to the rate at which the velocity of an object changes over time
ACCELERATION
occurs when object speeds up & slows down and change its direction
ACCELERATION
acceleration is mathematically expressed as
F=ma
1N= kg×m/s²
the role of change is constant over time
UNIFORM ACCELERATION
two categories of uniform acceleration
BALANCE FORCE
UNBALANCED FORCE
role of change of velocity is not constant
NON-UNIFORM ACCELERATION
when an object speed up it experience
POSITIVE ACCELERATION
when an object slows down it experiences
NEGATIVE ACCELERATION
it occurs when an object move in a circular pattern
CENTRIPETAL
a car traveling a highway increases its speed from 20 m/s to 30 m/s in 5 seconds
2 m/s²
formula of acceleration
vf - vi
_______
tf - ti
gravity
9.8m/s²
a cyclist moving at 15 m/s breaks and slows down to 5 m/s in 4 seconds
formula of final velocity
Vf=Vi+a•∆t
a motorcycle is traveling at 10 m/sand accelerates at a constant speed of 3 m/s for 4 seconds what is the vf of a motorcycle
22 m/s
formula of delta time
∆t=Vf-Vi
__________
a
a cyclist traveling at 15 m/s starts breaking and decelerates uniformly at -2m/s² how long it will take for the cyclist to stop
7.5 s
formula of centripetal
ac= V²
______
r
a car is moving around a circular truck with a constant speed of 20 m/s the radius of a truck is 50 m what is the car’s centripetal
8 m/s²
formula of instantaneous acceleration
a(t)=dV(t)
__________
d(t)
a car velocity is 4t² what is the cars instantaneous acceleration at 3s
24 m/s²
kinetic formulas
Vf=Vi+a•t
d=Vi(t)+½a•t²
d=½(Vi-Vf)t
Vf²=Vi²+2a•d
d=Vt-½a•t²
