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Cards In This Set
| Front | Back |
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Vector
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Has magnitude & direction
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Scalar
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Only has magnitude
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Adding Vectors
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Place head of the 1st vector to tail of the second vector & draw an arrow from the tail of the first to the head of the second
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Subtracting Vectors
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Place heads of the 2 vectors together & draw an arrow from the tail of the 1st to the tail of the 2nd ( or add the - of the verctor to be subtracted)
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Vector * scalar = ?
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A vector
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Vertical motion
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Acceleration is constant due to gravity (10m/s2)
- ideal situations w/ no air resistance the horizontal acceleration is a constant zero |
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O
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O = Hsin(theta)
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A
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A =Hcos(theta)
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Speed
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Distance/time
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Velocity
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Displacement/time
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Acceleration
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(change in) velocity/time
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The earth moves around the sun @ ~ 30m/s. Is the Earth accelerating?
A) No, b/c acceleration is a vector B) no, b/c the net displacement is 0 C) Yes b/c the speed is not constant D) Yes b/c the velocity is not constant |
Yes b/c the velocity is not constant
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An airliner flies from Chicago to New Your. Due to the shape of the Earth the airliner must follow a curved trajectory> How does the curved trajctory of the airliner affect its final displcement for this trip
A) displacement is less than it would be if the airliner flew in a straight line B) Displacement is greater than it would be in the airliner flew in a straight line to new york C) displacement is same as it would be if airliner flew in straight line to New York D) Displacement of airliner is zero |
Displacement is same as it would be if airliner flew in
straight line to New York
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Automobile that was moving forward on a highway pulled over onto an exit ramp & slowed to a stop. While the automobile was slowing down, which of the following could be true
A) V = + & a = + B) V = - & a = - C) V = + & a = - D V & a had same sign, either + or - |
V = + & a = -
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All of the following describe the magnitute & direction of a vecrtor Except:
A)10m/s West B) 10m/s in a circle C) 20m to the left D) 20m straight up |
10m/s in a circle
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