Acceleration Acceleration is the change

in velocity divided by the time it takes for the

change to occur.

Like velocity, acceleration has a direction.

AccelerationThere are three ways an object

can accelerate:1. Speeding up

2. Slowing down3. Changing direction

Summarize On your notes page, write

down 5 times you have accelerated today.

Compare answers with another person at your

table.

Calculating AccelerationThis is the formula for

acceleration:

acceleration = final speed – initial speed

time

In SI units, acceleration has units of meters per second squared

(m/s2)

InertiaInertia = tendency of an object to resist a change in

its motion.The greater an objects mass,

the greater its inertia and the larger the force needed

to overcome the inertia

InertiaExamples:Inertia is the resistance you

feel as you change the direction you are running on a field

You can feel inertia when you catch a fast baseball that stings your hands as its momentum decreases abruptly to zero.

Momentum Momentum = how hard it is to stop an object in motion.It depends on the object’s

mass and velocity.

momentum = mass (in kg) x velocity (in m/s)

Activity You are now going to choose

a sport and create a poster illustrating how momentum and inertia are important in that

sport.

Inertia = tendency of an object to resist a change in its motion.

The greater an objects mass, the greater its inertia and the larger the force needed to overcome the inertia

Momentum = how hard it is to stop an object in motion.

It depends on the object’s mass and velocity. Momentum = mass x velocity