The driver steps on the gas pedal and the car starts moving faster and faster. Just as speed is the rate of change of position, _________________ is the rate of change of velocity.
Acceleration.
When you think of acceleration, you probably think of something speeding up. However, an object that is _________________ ______________ is also accelerating.
Slowing Down.
Just as the slope of a line on a distance-time graph is the object's speed, the slope of a line on a speed-time graph is the object's _____________________.
Acceleration.
Formula for Acceleration? Be EXACT! (If you answer this one incorrect you are deducted points!)
Riding roller coasters in amusement parks can give you a feeling of danger, but these rides are designed to be ___________________.
safe
What is the object doing between point E and F?
Constant Negative Acceleration.
Daily Double!
What is the difference between velocity and speed?
Velocity has magnitude and direction;
Speed has magnitude only.
Student groups are asked to measure the speed of a toy car as it moves across a track on the floor. What instruments will be needed to complete the lab activity?
A meter stick and a stopwatch/timer.
A student on a field trip in Coach Williamson's class jumps from an airplane for no apparent reason. After 4 seconds, the student has a velocity of 36 m/s. Which of the following is the acceleration of the student if he began with an initial velocity of 0 m/s?
9 m/s2
A motorcycle has a velocity of 6 m/s. When needing to pass another car on the road, the motorcycle acccelerates to 15 m/s. This process takes 3 seconds. What is the acceleration of the motorcycle?
3 m/s2
If you have a speed of 12 m/s on the first day to school.
Then you have a speed of 13 m/s on the second to school.
Then you have 15 m/s speed on the last day to school.
What is your average speed? (Include units!)
13.3 m/s
What is the speed of the object represented by the graph?
10 m/s
Daily Double!
If you think about a horse carousel, it's speed remains constant, but it is accelerating because it's direction of motion changes. The change in the direction of the horse's velocity is ______________________ to the inward acceleration.
Perpendicular!
Daily Triple!
Acceleration toward the center of a curved or circular path is called _______________ ______________.
Centripetal Acceleration
Direction of velocity at the specific point? (going counter clockwise)
Good Job.
Direction of acceleration at specific point? (Going Clockwise)
Nice Job.
PUNISHMENT BOX
Your team just lost 400 points...
If you were to throw a ball as hard as you could in a perfectly horizontal direction, would it take longer to reach the ground than if you dropped a ball from the same height? Surprisingly, it will ____________!
Not
What does it mean when the number to your acceleration problem is negative?
The object is slowing down.
FREE SQUARE
Your team just received a free 400 points! Congrats!
Name the three types of ways an object can "accelerate".
A. Speeding Up
B. Slowing Down
C. Changing Direction
How long does it take to get to the end of the known universe using regular speed?
225,000,000,000,000 years
(225 Trillion)
If you could travel in the speed of light, how many times could you travel around the Earth in 5 seconds?
37.5 times!
What would Earth look like if it was shifted just a little towards the Sun? What planet might we resemble?
Desert wasteland; Venus
What is the closest star to our solar system?
Alpha Centauri or Proxima Centauri