Khan Academy Physics

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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


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