Chapter 5

Define scaler

A quantity that describes magnitude (size/amount), has no direction

ex) Distance, speed, time, temp

180km at 60km/h takes 3 h

Define vector

A quantity that includes direction as well as magnitude

Ex) displacement, velocity, force

WEM is 2km west of JP

What is the main difference between scaler vs vector

Vector has direction AND magnitude, while scaler has only magnitude

Define distance, ∆d

The total length of a path travelled

Define displacement ∆d→

The straight length distance from one position to another, direction matters!!

Define speed(scaler)

The distance travelled by an object during a given time divided by that time

Formula: V = d/t

v = speed, d =distance, t = time interval

Define velocity(vector)

The displacement travelled by an object during a given time divided by that time

Formula: V→ = d→/t→

or if you are provided with 2 points: V→ = (d2-21)/(t2-t1)

v = velocity, d =displacement, t = time interval

What does the slope tell us on a graph?

The objects velocity

Define uniform motion

A constant velocity

Define stationary

Not moving

What does a steeper slope mean?

A faster speed

Define acceleration

Any change in the velocity of an object during a time interval, it is a vector quantity

Ex) a car speeding up afte

what is the differences between positive and negative acceleration?

Positive is when the car is speeding up, while negative is when the car is slowing down

Is deceleration a proper term?

Technically yes, but in physics we need directions because a = vector

What is the formula for acceleration?

a→ = ∆v→ - ∆t

or

a→ = v2→ - v1→/ t2 - t1

Distance vs time graphs and what they mean! What does a graph with a stationary line look like?

Distance vs time graphs and what they mean! What does a graph with uniform motion look like?

With the slope = its velocity

Distance vs time graphs and what they mean! What does a graph with acceleration look like?

Velocity vs Time graphs and what they mean! What does a graph with uniform motion/zero acceleration look like?

Velocity vs Time graphs and what they mean! What does a graph with positive acceleration look like?

Velocity vs Time graphs and what they mean! What does a graph with negative acceleration look like?

What can we calculate using the slope of a v vs t graph?

Acceleration