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1. A runner moving eastward covers a distance of a 100 meters in 10 seconds. What is his velocity?

1. A runner moving eastward covers a distance of a 100 meters in 10 seconds. What is his velocity?. Given: D= 100 m T= 10s dir= East Formula V= d/t with dir Work V= 100m/10s East Answer V= 10m/s East.

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1. A runner moving eastward covers a distance of a 100 meters in 10 seconds. What is his velocity?

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  1. 1.A runner moving eastward covers a distance of a 100 meters in 10 seconds. What is his velocity? • Given: D= 100 m T= 10s dir= East • Formula V= d/t with dir • Work V= 100m/10s East • Answer V= 10m/s East

  2. 2.Lisa is walking to a friend’s house. She walks 500m for 10 minutes, then realizes she forgot something important to bring. She turns around, and hurries back to his house. The walk/jog back takes him 5 minutes. a. What was her average speed ? • Given: Total D= 500m + 500m = 1,000m • Total T= 10min + 5 min= 15min • Formula Ave S = total D/total T • Work Ave S = 1,000m/15 min • Answer Ave S = 66.7 m/min

  3. 2.Lisa is walking to a friend’s house. She walks 500m for 10 minutes, then realizes she forgot something important to bring. She turns around, and hurries back to her house. The walk/jog back takes her 5 minutes. b. What was Lisa’s velocity (in m/s) while walking to her friend’s house? Given: D= 500m T= 10min dir = forward (to her friend’s house) 1.Formula V= d/t with dir 2. Work V= 500m/10 min to friend’s house 3. Answer V= 50 m/minto friend’s house

  4. T= 10 min D= 500m D= 500m T= 5 min 2.Lisa is walking to a friend’s house. She walks 500m for 10 minutes, then realizes she forgot something important to bring. She turns around, and hurries back to his house. The walk/jog back takes him 5 minutes. Given: Total D= 500m + 500m = 1,000m Total T= 10min + 5 min= 15min

  5. 3.Nelson is running around the track oval. The oval is 800m long. He is running at a constant speed. It takes him 180 s to complete the track and get back to where he started. • What is Nelson’s speed in m/s? Given: d= 800 m t= 180 s running at constant speed

  6. What is Nelson’s speed in m/s? Given: d= 800 m t= 180 s running at constant speed 1. Formula S= d/t 2. Work S= 800m/180s around oval 3. Answer S= 4.44 m/s If Nelson is running at constant speed, is he also moving at constant velocity ? No, he is always changing direction (running around the oval).

  7. 4. Nemo is swimming his way to his best friend’s house Crush the Turtle. Nemo is swimming at 12 km/hour and the current is moving at 10 km/hr. a. On the way to Crush’s house he swims with the current. What is Nemo’scombined velocity on the way to Crush’s house? Given: Nemo V1= 12 km/h dir= to friends house with current current V2= 10 km/h dir= with current 1.Formula CV= V1 + V2 2. Work CV= 12 km/h + 10 km/h 3. Answer CV= 22 km/h with current or to friends house same direction means add

  8. 4. Nemo is swimming his way to his best friend’s house Crush the Turtle. Nemo is swimming at 12 km/hour and the current is moving at 10 km/hr. a. On the way to Crush’s house he swims with the current. What is Nemo’scombined velocity on the way to Crush’s house? Given: Nemo V1= 12 km/h dir= to friends house with current current V2= 10 km/h dir= with current 1.Formula CV= V1 - V2 2. Work CV= 12 km/h - 10 km/h 3. Answer CV= 2 km/h against current or away from friends house same direction means add

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