What is Speed Speed Speed The ratio of

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What is Speed? Speed: Speed The ratio of the distance an object moves to

What is Speed? Speed: Speed The ratio of the distance an object moves to the amount of time an object moves Average Speed: Speed over the course of the ENTIRE trip (with different speeds throughout) Instantaneous Speed: Speed at a particular point in time. Ex: Reading your speedometer

Speed vs. Velocity • Very similar, except velocity has direction • Both have same

Speed vs. Velocity • Very similar, except velocity has direction • Both have same number • EX: 55 mph is a speed. The velocity would be 55 mph EAST

Average Speed Example • If Joe drives 300 miles for 5 hours, what is

Average Speed Example • If Joe drives 300 miles for 5 hours, what is his average speed in mph (miles per hour)? • Miles / Hour • 300 Miles/ 5 Hours • We want per 1 hour (not 5) , so how do we get that? • What was his average speed? • 60 mph

Average Speed Example • If Fabian drives 300 miles for 5 hours, what is

Average Speed Example • If Fabian drives 300 miles for 5 hours, what is his average speed in mph (miles per hour)? • Miles / Hour • 300 Miles/ 5 Hours • We want per 1 hour (not 5) , so how do we get that? • What was his average speed? • 60 mph

Speed Equation • • V= d/t V= speed/velocity d= distance t= time

Speed Equation • • V= d/t V= speed/velocity d= distance t= time

A windsurfer travelled 28 km in 1. 75 hours. Calculate his speed. Use FSA!

A windsurfer travelled 28 km in 1. 75 hours. Calculate his speed. Use FSA! V= Formula Speed = Substitution = D T Distance Time 28 km 1. 75 h = 16 km/h Answer: His speed was 16 km / hour

Toy Train Speed Problem

Toy Train Speed Problem

A bus travelled at an average speed of 50 km/h for 2. 5 hours.

A bus travelled at an average speed of 50 km/h for 2. 5 hours. How far did it travel? FSA!!! V= D T Speed = Distance Time 50 km/h= d Need to do a little math here to get “d” by itself 50 km/h x 2. 5 hr= d 2. 5 hr = 125 km Answer: He travelled 125 km

A train travelled 555 miles at an average speed of 60 mph. How long

A train travelled 555 miles at an average speed of 60 mph. How long did the journey take? FSA!!! V= 60 mi/h = t = D T 555 mi t 555 mi 60 mi/h x t = 555 mi 60 mi/h = 9. 25 hours = 9 hours 15 mins Answer: It took 9 hours 15 minutes

 • In speed word problems, you will be asked to solve for either

• In speed word problems, you will be asked to solve for either speed, distance, or time. • 2 options-always use v=d/t and solve using cross-multiplying/dividing OR use these (more memorization): Speed = Distance Time = Distance Speed Distance = Speed x Time