Science 10Mrs. Knowles

Physics Part 1: Solving equations

Time interval: difference between _______________ and _____________.

Symbol:______________

Calculating Vectors:

**Because they measure _________ AND _________, we must have a way to represent the direction.

This is done using the symbols _________ and _______.

Must define which direction is + and which is - .

Examples:

Scalar

Definition:

Examples:

Vector

Definition:

Symbol:

Examples:

Science 10Mrs. Knowles

1. Distance & Displacement

Distance: is a ___________ number that means how much __________________ an object has covered.

Displacement: is a ___________ number that means how far the object is from _____________________________________________.

Symbols to know:

di :

df :

d :

Calculating d :

Example:

What is the distance of a 100 m sprint running forward? What is the displacement of a 100 m sprint running forward?

d=

d=

Science 10Mrs. Knowles

What is the distance of a 400 m run around the track? What is the displacement of a 400 m run around the track?

d=

d=

A boat travels 60 m East, then turns around and travels 85 m West. What is the distance? What is the displacement?

Displacement Activity: Map out a path (on the attached paper) for your partner to walk and measure their distance and calculate displacement.

CHECKPOINT:

Science 10Mrs. Knowles

2. Speed & Velocity

Speed is a ______________. It is the _________ travelled during a given period of time divided by the time. Measured in m/s.

Velocity is a ______________. It is the ____________ during a given period of time divided by the time. Measured in m/s.

Constant Velocity: the _________ and _________ of an object is not changing.

Positive velocity: moving ______________ starting position.

Negative velocity: moving ______________ starting position.

Zero velocity: ______________

Calculations: use the formulas:

Example: What is a sprinter’s average velocity if it takes her 8.2 s to run 75 m forward?

Science 10Mrs. Knowles

Example: What is the displacement of a skateboarder who travels 3.5 m/s West for 12 s?

Example: If a cyclist travels south at 12 m/s, how long would it take the cyclist to travel 600 m south?

CHECKPOINT:

CHECKPOINT:

COMPLETE PRACTICE PROBLEMS ON PAGE 370

Science 10Mrs. Knowles

3. Acceleration: a change in _____________.

V :

Vi

Vf

Example 1: You start riding a bicycle at 6 m/s but then you start going down a hill and you increase your velocity to 9 m/s. What is your change in velocity?

Vi =

Vf =

V=

Example 2: You are running at 4 m/s but then you get a cramp and you can now only run at 1 m/s. What is your change in velocity?

Example 3: During a 800m race, you begin the race running at 5 m/s and you end the race running at 5 m/s. Calculate V.

Science 10Mrs. Knowles

How can we change velocity?

1.

2.

Example 1: A car moving at 50km/h accelerates to 60km/h in 7.0 seconds. Determine its acceleration.

Positive acceleration: an _____________ in velocity

Negative acceleration: a ____________ in velocity

CHECKPOINT

Science 10Mrs. Knowles

CHECKPOINT

CHECKPOINT

CHECKPOINT