motion review physical science. 1. true or false… motion is measured relative to a reference...
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Motion ReviewPhysical Science
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1. True or False…
Motion is measured relative to a reference point.
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TRUE
Motion is measured relative to a reference point.
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2. True or False…
Average speed is the rate at which an object is moving at a given instant.
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False
Instantaneous speed is the rate at which an object is moving at a given instant.
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3. True or False…
A meter is a place or object used for comparison to determine if something is in motion.
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FALSE
A reference point is a place or object used for comparison to determine if something is in motion.
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4. True or False…
If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same velocity.
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FALSE
If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same speed.
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5. True or False…
A straight diagonal line on a distance vs. time graph indicates constant speed.
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TRUE
A straight diagonal line on a distance vs. time graph indicates constant speed.
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6. True or False…
A horizontal line on a distance vs. time graph means that the object is at rest.
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TRUE
A horizontal line on a distance vs. time graph means that the object is at rest.
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7. True or False…
A child riding on a merry-go-round is accelerating because his direction is changing.
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TRUE
A child riding on a merry-go-round is accelerating because his direction is changing.
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8. True or False…
The SI unit of velocity is the meter per second per second.
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FALSE
The SI unit of acceleration is the meter per second per second.
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9.True or False…
A straight line on a graph of speed vs. time means that the object has a constant acceleration.
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TRUE
A straight line on a graph of speed vs. time means that the object has a constant acceleration.
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10. True or False…
The steepness of a line graph is referred to as the run.
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FALSE
The steepness of a line graph is referred to as the slope.
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11.
A reference point is assumed to be _______, or not moving.
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11.
A reference point is assumed to be __stationary_____, or not moving.
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12.
A change in an object’s position relative to a reference point is called _______________.
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12.
A change in an object’s position relative to a reference point is called ____motion___________.
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13.
When riding a bicycle past a building, you are not moving relative to the ____________.
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13.
When riding a bicycle past a building, you are not moving relative to the ___bicycle_________.
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14.
Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the _____________.
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14.
Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the south.
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15.
The distance traveled by a moving object per unit of time is called ____________________.
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15.
The distance traveled by a moving object per unit of time is called ______speed_____.
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16.
The basic SI unit of length is the _________________.
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16.
The basic SI unit of length is the meter.
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17.
Speed that does not change is referred to as ____________ speed.
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17.
Speed that does not change is referred to as constant speed.
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18.
The statement that the motion of a hurricane is 20 km per hour in an easterly direction is a description of the hurricane’s _______________.
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18.
The statement that the motion of a hurricane is 20 km per hour in an easterly direction is a description of the hurricane’s velocity.
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19.
A speed of 15 km per hour is abbreviated as 15 _____
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19.
A speed of 15 km per hour is abbreviated as 15 km/h.
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20.
Acceleration is the rate of change in _______________.
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20.
Acceleration is the rate of change in velocity.