1. Exploring Motion & Forces

2. I. Motion & Speed is the change of position. - need a reference point or a stationary object. a. Motion-

3. b. Speed - the rate of change of motion or -how fast something is moving

4. -Three Types of Speed 1. Instantaneous Speed - Speed at any given moment. - Ex. Car Speedometer

5. 2. Constant Speed - speed that does not vary. - Ex. Cruise Control

6. 3. Average Speed = total distance time Example: A car travels 30 miles in 5 hours. What is the cars average speed? Average Speed = 30 miles = 5 hours 6 miles/hr

7. C. Velocity - 2 Components 1. Speed 2. Direction

8. 4. Units for Velocity in the S.I. System. Meters or m Second s

9. Example Problems 1. Lisa sprints 50 meters in 10 seconds. How fast is Lisa sprinting? v = d = t = Answer: ________

10. The longest distance in a track and field event is the 10 km run. The record breaker is Wang Junxia of China. Assuming that Wang Junxia ran a distance of 10.00 km with an average speed of 5.644 m/s, what was her time? v = t = d =

11. The maximum posted speed limit on the US Interstate Highway System may be found in rural areas of several western states. This maximum speed is 75 mi/h, or 121 km/h. What is the distance, in kilometers, traveled by a car moving continuously at this speed for 3 hrs and 20 minutes? v = d = t =