Motion Speed Distance Acceleration 2272021 2272021 P 2

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Motion Speed, Distance & Acceleration 2/27/2021

Motion Speed, Distance & Acceleration 2/27/2021

2/27/2021 P 2 -The Syllabus Says You Need To… DISTANCE, SPEED AND ACCELERATION Candidates

2/27/2021 P 2 -The Syllabus Says You Need To… DISTANCE, SPEED AND ACCELERATION Candidates should: (a) describe motion using speed, acceleration, velocity-time and distance-time graphs. (b) select and use the equations to calculate: distance, speed or time (c) Understand what is meant by the term ‘acceleration’ and be able to calculate it (d) Use velocity-time graphs to determine acceleration and distance travelled.

Objectives: By the end of the lesson you should: Understand what is meant by

Objectives: By the end of the lesson you should: Understand what is meant by the ‘speed’ Be able to calculate the speed of an object Rearrange the speed equation 2/27/2021

Starter: THINK! When we talk about how fast an object is moving-what units do

Starter: THINK! When we talk about how fast an object is moving-what units do we use? How do speed cameras actually know if we are speeding or not? (Think about what it might measure) 2/27/2021

What is speed? Speed is a measure of how far an object moves in

What is speed? Speed is a measure of how far an object moves in a given time. This car is travelling at 60 mph. This means the car travels 60 miles every hour. This jet is travelling at 350 m/s. This means the jet travels 350 metres every second.

2/27/2021 Describing Motion: Definitions-Write these in the BACK of your book The Motion of

2/27/2021 Describing Motion: Definitions-Write these in the BACK of your book The Motion of an object can be described using the quantities below. Write a definition for each one. • Distance • Time • Speed • Distance-measured in meters (m). How FAR an object travels a from one point to another • Time-measured in seconds (s). How LONG an object takes to travel from one point to another • Speed-measured in meters per second (m/s). A measure of how fast or slow an object is moving. Or how far an object moves in a given time.

How is speed calculated? The speed of an object can be calculated using this

How is speed calculated? The speed of an object can be calculated using this equation: speed = distance travelled time taken

Using a formula triangle A formula triangle helps you to rearrange a formula. The

Using a formula triangle A formula triangle helps you to rearrange a formula. The formula triangle for speed (s), distance (d) and time (t) is shown below. Cover the quantity that you are trying to work out, which gives the rearranged formula needed for the calculation. So to find speed (s), cover up s… x …which gives the formula… s = d t

Calculating speed Question 1 A train takes 100 seconds to travel 1, 500 m.

Calculating speed Question 1 A train takes 100 seconds to travel 1, 500 m. What is the speed of the train? With ALL calculations you should follow the same method: 1. Write Equation 2. Rearrange if you need to 3. Check units-do you need to change them 4. Calculate speed = distance time = 1, 500 100 = 15 m/s

Calculating speed Question 2 A car travels at 25 m/s for 3 minutes. How

Calculating speed Question 2 A car travels at 25 m/s for 3 minutes. How far does it travel? speed = distance time distance = speed x time = 25 x 180 = 4, 500 m = 4. 5 km

Now complete work sheet

Now complete work sheet