2 SpeedDistance traveled divided by the time it takes to travel that distanceSpeed = distancetimeSample units: m/s, km/h, km/s, m/hIf a car travels 30 km in 5 hours, what was the car’s speed?
3 Velocity Speed of an object in a specific direction To calculate velocity you would use the formula for speed and then include the direction in which the object is traveling
4 Is this a speed or velocity measurement? A car traveled at 10 km/hr.A plane traveled north at 48,000 km/hr.A cheetah ran 5 km/hr north and then turned around and headed south.
5 Calculate Speed A marathon runner completed 10 km in 2 hours. A car traveled 500 km in 6 hours.A cheetah ran 25 km in 5 hours.A plane traveled 1000 km in 10 hours.
6 Calculate Average Speed Remember to use the complete distance and complete time.Average Speed = total distancetotal timeA family takes a car trip. They travel 80 km in an hour. After a pit stop, they travel another 70 km in 2 hours. What is their average speed?
7 Calculate Average Speed If a car travels 50 km in 3 hours and then travels another 100 km in 2 hours, what is the average speed of the car?If a train travels 150 km in 2 hours and then after it stops to pick up new passengers it travels another 200 km in 3 hours, what is the average speed of the train?
8 An object accelerates if: Speed changes (faster or slower)Direction changesBoth speed and direction change
9 Are the following objects accelerating? A car goes 50 km/h to the north.A car changes its speed from 25 km/h to 100 km/h.An eagle travels at 25 km/h to the north and then turns around and flies south.
10 Acceleration Acceleration is the rate of change of velocity over time Acceleration = final velocity - starting velocitytimeSample units: m/s2, km/h2Since acceleration is a change in velocity you have to include a direction
11 Calculate Acceleration A cheetah traveling south accelerates from 20 m/s to 34 m/s in 7 seconds.An eagle traveling east accelerates from 15 m/s to 22 m/s in 4 seconds.
12 Calculate Acceleration A car traveling to the west decelerates from 100 km/hr to rest in 2 hr.A cheetah running south goes from 40 m/s to rest in 5 seconds when it spots its prey.