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

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Presentation transcript:

Exploring Motion & Forces

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

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

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

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

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

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

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

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

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 km with an average speed of m/s, what was her time? v = t = d =

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 =