Acceleration
Presentation
•
Science
•
9th Grade
•
Medium
+10
Standards-aligned
Armie Estrobo
Used 73+ times
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14 Slides • 11 Questions
1
Acceleration
by Armie Estrobo
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After this lesson, you will learn to answer the following questions:
1. What is an accelerating object?
2. What is acceleration and how do you determine its magnitude and direction?
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4
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The object is accelerating if
Its changing its velocity.
Its changing its direction'
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Sports announcers will occasionally say that a person is accelerating if he/she is moving fast.
Yet acceleration has nothing to do with going fast.
A person can be moving very fast and still not be accelerating.
Acceleration has to do with changing how fast an object is moving. If an object is not changing its velocity, then the object is not accelerating.
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Multiple Choice
Why does a car accelerate as it round a corner at a constant speed?
Its direction changes
It slows down
It doesn't
Its speeds up
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10
Multiple Choice
When are you NOT undergoing an acceleration in a car?
speed up
constant speed
slow down
make turns
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EQUATION FOR ACCELERATION
Delta= Change
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Typical Acceleration Units
m/s/s
mi/hr/s
km/hr/s
m/s2
km/hr2
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Multiple Choice
The SI unit for acceleration is
mph
m/s2
ft/sec
m/s
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Multiple Choice
.
In each of the following cases, determine where the car has no acceleration?
A car speeds up after a stoplight turns green.
A car with the cruise control set at 80 km/h going down a straight highway
A car slows down as it approaches a red light
A car turning a curve at a constant speed
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A car accelerates from 12.2 m/s to 28.6 m/s in 2.4 s. Determine the acceleration of the car
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final answer = 6.8 m/s2
A car accelerates from 12.2 m/s to 28.6 m/s in 2.4 s. Determine the acceleration of the car
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You are driving 75 mph then came to a stop that took you 20 s. Calculate your acceleration
Vf = O mph t = 20 s
Vi = 75 mph a = ?
Equation/Formula
final answer = -3.8 mph/s
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Multiple Choice
A negative acceleration means that your object is _____.
not accelerating
speeding up
not moving
slowing down
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Multiple Choice
A positive acceleration means that your object is _____.
not accelerating
speeding up
not moving
slowing down
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Multiple Choice
A rightward-moving motorcycle increases its velocity from 5.0 m/s to 25.0 m/s in 10 s. Find the final velocity?
5.0 m/s
25.0 m/s
10 s
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Multiple Choice
You are riding your bike at 9 km/h. Ten minutes later, your speed is 6 km/h. Find the time in this problem.
9 km/h
6 km/h
ten minutes
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Multiple Choice
Which term defines that the velocity is 0.
accelerating
rest
slowing down
speeding up
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Multiple Choice
A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?
Incorrect
24 m/s2
16 m/s2
18 m/s2
16 m/s
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Multiple Choice
A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.
2.2m/s2
5.7m/s2
7.0m/s2
70m/s2
Acceleration
by Armie Estrobo
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