#### Transcript of Unit 1:Kinematics SPH3UR

Kinematics

Speed and Velocity in one or two dimensions

Average speed = Distance traveled divided by the change in time

Average velocity = The change in position divided by the change in time

d = d + d

2

1

d = d - d

2

1

The study of motion

An arrow over a symbol ( ex. F) indicates a vector quantity which is a quantity that has a magnitude and direction.

Acceleration in one and two dimensions

Acceleration = the change in velocity divided by the time interval

**The area under an acceleration time graph is the change in velocity.**

The area under a velocity time graph is the displacement.

Acceleration due to gravity

In 2D problems, you can break vector quantities into thier x and y components. ( refer back to the 5 fundamental kinematics equations ) although they can be broken down into their components you must only use all x's or all y's when using an equation they cannot be mixed into one equation.

Projectile motion

V x= x

t

1

where delta x is the distance horizontally (range).

Projectile motion is motion with a constant horizontal velocity combined with a constant vertical acceleration due to gravity( 9.8 m/s ) down.

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