4508509
Descripción
Test por Jillian Caldwell, actualizado hace más de 1 año
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Creado por Jillian Caldwell
hace alrededor de 8 años
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Pregunta 1
Pregunta
A speedometer normally measures __________.
Respuesta
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velocity
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distance traveled
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average speed
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instantaneous speed
Pregunta 2
Pregunta
The difference between speed and velocity involves ________.
Respuesta
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acceleration
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path length
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direction
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the magnitude of each
Pregunta 3
Pregunta
Galileo discovered that when air resistance can be neglected, all objects fall with the same _______.
Respuesta
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acceleration
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distance
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speed
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energy of motion
Pregunta 4
Pregunta
Each second, a ball rolling down an inclined plane picks up ___________.
Respuesta
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increasing amounts of speed
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acceleration, not speed
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the same amount of speed
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decreasing amounts of speed
Pregunta 5
Pregunta
When we're talking about how quickly "how fast" changes, we're talking about _______.
Respuesta
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increases in falling distance
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acceleration
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the difference between speed and velocity
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free-fall physics
Pregunta 6
Pregunta
In its first second of free fall, a dropped softball will fall a vertical distance of ________.
Respuesta
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20m
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15m
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5m
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10m
Pregunta 7
Pregunta
A ball freely falling at 20 m/s will in the next second have a speed of _________.
Respuesta
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more than 30 m/s
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20 m/s
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10 m/s
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30 m/s
Pregunta 8
Pregunta
The vertical height attained by a basketball player who achieves a hang time of a full 1 s is...
Respuesta
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about 1.2 m
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about 0.8 m
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more than 2.5 m
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about 2.5 m
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about 1 m
Pregunta 9
Pregunta
A pot falls from a ledge and hits the ground 45 m below. The speed with which it hits the ground is
Respuesta
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about 60 m/s
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about 120 m/s
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about 30 m/s
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more than 120 m/s
Pregunta 10
Pregunta
A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds?
Respuesta
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about 80 m/s
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about 60 m/s
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about 50 m/s
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about 100 m/s
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about 110 m/s
Pregunta 11
Pregunta
A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 30 m/s?
Respuesta
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2 seconds
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15 seconds
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60 seconds
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30 seconds
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none of these
Pregunta 12
Pregunta
If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about
Respuesta
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1 second
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10 seconds
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2 seconds
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20 seconds
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not enough info to estimate
Pregunta 13
Pregunta
If a projectile is fired straight up at a speed of 10 m/s, the time it takes to reach the top of its path is about
Respuesta
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2 seconds
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1 second
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10 seconds
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not enough information to estimate
Pregunta 14
Pregunta
In each second of fall, the distance a freely falling object will fall is
Respuesta
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about 10 m
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the same, but not 5 m or 10 m
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about 5 m
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increasing
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none of these
Pregunta 15
Pregunta
It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
Respuesta
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more than 200 m
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about 60 m
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about 120 m
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about 180 m
Pregunta 16
Pregunta
Starting from rest, the distance a freely falling object will fall in 0.5 second is about
Respuesta
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0.5 m
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1 m
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1.25 m
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5 m
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none of the above
Pregunta 17
Pregunta
A ball is thrown upwards and caught when it comes back down. In the presence of air resistance, the speed with which it is caught is always
Respuesta
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more than the speed it had when thrown upwards
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the same as the speed it had when thrown upwards
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less than the speed it had when thrown upwards
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impossible to determine
Pregunta 18
Pregunta
At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately
Respuesta
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55 m/s
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50 m/s
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60 m/s
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40 m/s
Pregunta 19
Pregunta
If a car accelerates from rest at 2 meters per second per second, its speed 3 seconds later will be about
Respuesta
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2 m/s
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3 m/s
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4 m/s
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6 m/s
Pregunta 20
Pregunta
A car accelerates at 2 meters/s/s. Assuming the car starts from rest, how far will it travel in 10 s?
Respuesta
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10 m
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100 m
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2 m
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40 m
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200 m
Pregunta 21
Pregunta
A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is
Respuesta
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1000 km/hr
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110 km/hr
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10 km/hr
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zero
Pregunta 22
Pregunta
An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately
Respuesta
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0
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24
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5
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8
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