LEARNING TARGET: I understand the relationship between distance, time and speed. I can explain the relationship Mar 19 / Act E 74 Measuring.

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Presentation transcript:

LEARNING TARGET: I understand the relationship between distance, time and speed. I can explain the relationship Mar 19 / 20 Act E 74 Measuring Speed CH Q How can you measure the speed of a moving cart? VOCAB: Next slide

Distance Error Rate speed Time interval Review: variable(s); evidence length measurement (beginning to end) inaccuracy (in measurement) ratio of one thing compared to another (given later) measurement from start to stop

DISCUSSION How did people measure speed before electronic devices were invented? how many days (or approximate hours) it took by walking / horseback / sailing, etc. a distance 2. What are the components for measuring speed? Distance and time interval 3. Based on the above answer, can you determine a formula for determining the speed of an object? Think car when driving, how do you measure that? Miles per hour or MPH Speed = distance / time

DISCUSSION (cont) Using the formula for speed, what is the speed of a car that travels 100 miles in 2 hours? Speed = distance / time 100 miles _________ = 50 miles / hour (MPH) 2 hours

PROCEDURE AND DATA MATERIALS: PROCEDURE: Read on pg. E 8-10 and summarize DATA: WS 74.1 Cart Speed Pre-lab thought: Why are we doing 3 trials?

ANALYSIS - Discuss and answer Q 2 & 5 on pg. E 10 ANS CH Q How can you measure the speed of a moving cart? A: measure time it takes to go a known distance (vocab) Speed = distance / time or S = d / t HOMEWORK Bring Glue Sticks / scissors