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15
×
What does a flat line on a distance-time graph represent
Object at rest
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15
×
Calculate the force required to throw a 0.5 kg basketball upwards.
F=mg = 0.5 x 9.8 N = 5 N [UP]
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15
×
Determine the forces acting on a person in free fall
gravity
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thief
Give points!
5
10
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25
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star
Double points!
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gift
Win 25 points!
Okay!
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lifesaver
Give 10 points!
Oops!
15
×
Explain why a truck requires more time and more force to brake than a car?
Can talk about Newton's first or second law
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15
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The ---------------------- (steeper/flatter) the slope of a distance time graph, the faster the object.
Steeper (flatter means slower)
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monster
Reset all scores!
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seesaw
Swap points!
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rocket
Go to first place!
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thief
Give points!
5
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25
15
×
What is the net force of something with constant velocity
0 N - something at rest or something with constant velocity (no acceleration)
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15
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What is Newton's First law
Inertia- object in motion stays in motion, object at rest stays at rest. (Unless it experiences an external force)
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15
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Determine the forces acting on a basketball falling down
gravity, air resistance.
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monster
Reset all scores!
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gold
Win 50 points!
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shark
Other team loses 25 points!
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thief
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25
15
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What changes depending on gravity: weight or mass
weight
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15
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The slope of a distance time graph gives what value?
Speed
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15
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Liam ran 20 km east, 20 km west, and then 5 km south all in 1 hour. What is his speed?
45 km/h
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15
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Convert 15 kg to weight.
147 N
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15
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Calculate the force of gravity acting on a basketball that is 0.5 kg.
F=mg = 0.5 x 9.8 = 4.9 N = 5 N [down[
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