Notes Test01.

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Presentation transcript:

Notes Test01

To calculate acceleration Start Velocity – Final Velocity Time

What’s your velocity You leave NYC and travel south to mobile in one hour you travel 90 km Must include units and direction (south, north, east or west)

Answer 90 km/h south

You drop an object at towards earth at 9 You drop an object at towards earth at 9.8 m/s will its velocity increase, decrease, or stay the same?

Answer Increase by 9.8 m/s

A ball drop of a rooftop. What’s the ball velocity after 4 sec?

39.2 m/s 9.8 (space) X 4

Galileo The RATE is NOT affected the MASS At which an object falls

SI Unit for Speed = M/S

Components of projectile motion have no affect on each other

Projectile motion Accelerated downward/gravity Accelerate horizontally Thrown/ horizontal push

Projectile motion : Horizontal or vertical

Projectile motion : Horizontal or vertical

On the moon Feather and a rock would have the same mass/weight on the moon

Earth mass triple Your weight and gravity will INCREASE

Acceleration Ride your bike north 100 m CONSTANT speed for 5 min what’s your acceleration?

NO acceleration CONSTANT did not accelerate

Example of acceleration is a car turning a corner

Velocity Running 50 m/s forward chasing someone at 4 m/s

Answer 54 m/s foward 50 + 4 = 54 m/s forward

Bull’s eye Always aim above the bulls eye

Acceleration to occur Change in speed , direction & Velocity

Velocity of 32 m/s in 3 sec he stop What’s the acceleration

Answer 0-32 32 = 10.7 time 3

The curve path traveled by a thrown baseball …projectile motion Example …leaping frog

A reference point for determining position and motion could be Earth’s surface A moving object A building

When gravitational force changes weight changes

You move from the front of the bus to the back of the bus @ 25 m/s east at a rate of 1 m/s What’s your velocity

25-1 = 24 m/s east

How fast are you able to run 200m race in 25 seconds

8 m/s 200 = 8 m/s 25

Parachutes Increase air resistance

Orbital motion Motion and Free Fall

3 balls drop @ same time &height They would all hit at the same time

A student riding a bike and covers one block every 10 seconds shows: Show constant speed and Velocity

Skating is an example Negative acceleration acceleration deceleration

Average speed A bird flys 100m for 10 s, 300 m for 10 s than 200 m for 5 sec

Answer 100/10 +300/10+ 200/5 =26.7 m/s

Anwser Somton 5 m/s/s

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