Khan Academy Physics
1.3888m/sec 5 km/hr *1000m/1km * 1hr/60min * 1min/60sec
How many meters per second is 5 kilometers per hour
5km/hr to the north 5 km N / 1 hour
If Shantanu was able to travel 5 km north in 1 hour in his car, what is his average velocity
240 seconds 720/3
Ben is running at a constant velocity of 3 meters per second to the east. How long will it take him to travel 720 meters?
Distance in a specific direction
Define: Displacement
Speed in a specific direction
Define: Vector
a = ∆v/∆t acceleration = change in velocity over change in time
What is the formula for acceleration
s = v * ∆t displacement = velocity * change in time
What is the formula for displacement
Rate = distance / time r = d/∆t
What is the formula for rate of travel
velocity = displacement / time v = s/∆t
What is the formula for velocity
Displacement (s)
What is the vector quantity version of distance
Vector (v)
What is the vector quantity version of speed
the slope of the line
in a |velocity| vs time graph what part is acceleration
magnitude and direction
what 2 bits of information does a vector need
velocity vs time graph where magnitude of velocity = y and time = x
what graph can you draw for acceleration
∆velocity over time
what is the formula for acceleration
∆m/∆t
what is the formula for average velocity
distance = rate * time d = r*t
what is the formula for distance
area = 1/2 * base * height
what is the formula for the area of a trianlge
D = ∆t * ½(Vi +Vf) distance = change in time times ½(initial velocity + final velocity)
what is the kinematic formula for average velocity
Vf = Vi + (∆t)Ac final velocity = initial velocity + change in time * constant acceleration
what is the kinematic formula for final velocity
s with an arrow on top
what is the letter most commonly used for displacement
d
what is the letter most commonly used for distance
r
what is the letter most commonly used for rate
t
what is the letter most commonly used for time
v with an arrow on top
what is the letter most commonly used for velocity
