Trajectory is the path taken by a moving object over time, displacement is the shortest distance between origin and end and also direction taken by the object.
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15
An objects speed is a measure of what?
how fast an object is moving
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25
A sprinter in a 100 dash accelerates uniformly from rest reaching a top speed of 14.7 m/s after 6.00 seconds. He then runs at constant speed for the rest of the race. What is his rate of acceleration during the initial phase of the race?
a = âv/ât = (14.7 â 0)/6.0 = 2.45 m/s2
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10
Every action has...
an equal and opposite reaction.
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10
What force changes with speed?
Air resistance
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seesaw
Swap points!
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shark
Other team loses 15 points!
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rocket
Go to first place!
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banana
Go to last place!
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20
For the above position-time graph during which interval is the average velocity greatest.
a) OA., During this interval âx/ât is largest.
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10
An accelerating body must at all times
have a changing velocity; acceleration means that the velocity is changing
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lifesaver
Give 25 points!
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gift
Win 5 points!
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fairy
Take points!
5
10
15
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25
baam
Lose 25 points!
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20
An object goes from one point in space to another. After it arrives at its destination is the displacement the same, greater, or less than the distance traveled?
its displacement is never larger than its distance traveled
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15
Elastic materials, and objects such as springs, change shape when a force is exerted on them, a change in shape like this is called what?
Deformation
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20
During which interval is the instantaneous velocity of the particle greatest?
d) CD, Instantaneous velocity is the slope of the position time graph.
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20
What is hooks law equation?
F=kx
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15
What are forces?
a push or pull that causes a change in speed, direction or shape, some forces are affected by speed, all forces come in pairs