When a force of F is applied to an object with a mass of M it causes an acceleration of A. If the applied force is doubled (2F) what is the acceleration?
2A (double)
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5
Which is greater static friction or kinetic friction?
static friction
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10
If the frictional force is greater than the applied force is the object speeding up or slowing down?
slowing down
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15
What is the formula for calculating the gravitational force on an object?
F=mg (F=m x -9.8)
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15
What is Newton's 2nd Law?
F = ma
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10
What does the slope of a displacement (position) v. time graph tell you?
velocity
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baam
Lose 25 points!
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shark
Other team loses 20 points!
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rocket
Go to first place!
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baam
Lose 10 points!
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15
What do you know about the velocity if the forces on an object are balanced?
velocity is constant
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25
Is the car in the FBD speeding up or slowing down? How do you know?
speeding up; Fnet =( 275+395)-560 = +110 N; Fnet is to the right and velocity is to the right --> object is speeding up
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seesaw
Swap points!
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seesaw
Swap points!
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fairy
Take points!
5
10
15
20
25
baam
Lose 5 points!
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20
What must be true about acceleration and velocity if an object is speeding up?
acceleration and velocity must be in the same direction
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15
When an object is thrown up into the air what is the velocity at the highest point (peak of the parabola)?
0 m/s
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10
What force typically opposes the gravitational force?
normal force (sometimes tension force)
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15
When an object is thrown up in the air what is its acceleration?
