Warm-Up

Warm-Up Monday, November Draw the image below and write the question.

Unbalanced forces are acting on the soccer ball. Which direction will the ball move? Support your reasoning. The ball will move to the left because the blue force has more Newtons.MYP Question:AoI: IB Learner:EQ:

What moves you?Human IngenuityWhat is the relationship between velocity and acceleration?Knowledgeable, InquirerS8P3. Students will be able to demonstrate the effect of balanced and unbalanced forces on an object in terms of gravity, inertia, and friction. Motions of Movement:Acceleration, Speed, VelocityLook around the room, do you see anything/anyone moving?OpeningAre you moving?

Is the boy moving?

It depends on the reference point.Reference point - The point from which motion is being observed - The object that appears to stay in place

Motion - when an object changes position over time relative to a reference point

SpeedDistance traveled in a unit of timeSpeed = Distance TimeSpeedTimeDistance

Do you move at a constant speed?

Distance traveled during each hour is different.

The distance varies because the speed is not constant.

Practice Speed ProblemHenry drives about 1,120 km from Baltimore, MD to Atlanta, GA. It takes him 14 hours to get there. What is Henrys speed for the trip?Speed = distance timeSpeed = Distance Time 1,120 km 14 hours 80 km/hour

Which car is moving faster?

Hint: Find the average speed foreach car.

What do you notice about theslope of the line when the car ismoving faster?

Blue Car: 50 2 = 25 m/sRed Car: 50 5.5 = 9.09 m/sFaster = Steeper SlopeImagine that two birds leave the same tree at the same time. They both fly at 10 km/h for 5 min, 12 km/h for 8 min, and 5 km/h for 10 min. Why dont they end up at the same place?The birds went in different directions. Their speeds were the same, but they had different velocities. Dont write this down.VelocitySpeed with a directionExample: 2 m/s NorthV = displacement (distance)time

The speeds of these cars may be similar, but the velocities of the cars differ because the cars are going in different directions.

Changing velocity

When the direction of a moving objectchanges, the velocity changes even if the speed stays the same.Velocity (continued)

Both cars are moving 20 m/s (meters per second).

Both cars have the same speed but they do not have the same velocity because they are moving in different directions.

Sample Velocity ProblemVancouver is approximately 225 kilometers north of Seattle. What is the average velocity of a bus traveling directly from Seattle to Vancouver if the trip takes 3 hours?Velocity = Displacement (distance) Time = 225 km North 3 hours = 75 km/hr NorthAccelerationRate at which velocity changesIncreasing speed, decreasing speed or changing direction.Acceleration = change in velocity timeDont confuseSpeed with Acceleration!

When is the car accelerating (speeding up) and decelerating (slowing down) ?

How would the graph look?0 1 2345678910111213141516171819

Sample Acceleration ProblemA car leaves a stop sign traveling south and accelerates from 0 m/s to 30 m/s in 10 seconds.What is the rate of acceleration?A = Change in velocity time = (V2 V1 ) time = (30 m/s 0 m/s) 10 seconds = 30 m/s 10 seconds = 3 m/s2Application: Show your understanding of these concepts by completing the activity sheets.

All Students: Calculating Speed Calculating VelocityIn order to receive credit, you MUST show your work.

Motion Lab TomorrowThe following graph gives the distance traveled by a cyclist from his home. What most likely was the cyclist doing between 2 and 3 p.m.?

ClosingAcceleration Labhttp://content3.jason.org/resource_content/content/digitallab/13865/misc_content/in_motion.html