14975627
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace casi 6 años
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Pregunta 1
Pregunta
A tractor is moving in a straight line, in a direction we shall define as x. Its Position versus Time graph is shown by the graph at the left:
Respuesta
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A
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B
Pregunta 2
Pregunta
A tractor is moving in a straight line, in a direction we shall define as x. Its Position versus Time graph is shown by the graph at the left:
(a) What is the position of the tractor, in meters, at 2.0 seconds? [blank_start]Answer[blank_end]
(b) What is the slope of the line in the graph above, in m/s? Give your answer in decimal form. [blank_start]Answer[blank_end]
Respuesta
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0.8
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0.3
Pregunta 3
Pregunta
Suppose a second tractor is also moving in the x-direction, but at a higher speed. How would the Position versus Time graph of the second tractor be different to the one shown?
Respuesta
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The slope would be smaller.
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The slope would be greater.
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The intercept would be smaller.
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The intercept would be larger.
Pregunta 4
Pregunta
Which of the following are vector quantities? Select two.
Respuesta
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Velocity
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Speed
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Acceleration
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Distance
Pregunta 5
Pregunta
If a car moves with constant acceleration, is it possible for the car’s velocity to change direction?
Respuesta
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Yes, this is possible if the car starts from rest, speeds up, slows to a stop, and then backs up.
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Yes, this is possible if the car is moving up and down a ramp, for example.
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No, this is not possible because the car is always speeding up.
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No, this is not possible because the car is either always speeding up or always slowing down.
Pregunta 6
Pregunta
If a car’s initial velocity is zero and acceleration is negative, which of the following best describes the motion of the car?
Respuesta
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The car speeds up with a velocity in the negative direction.
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The car slows down.
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The car remains at rest.
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The car speeds up from rest.
Pregunta 7
Pregunta
When acceleration and velocity vectors are pointing in opposite directions, the object is:
Respuesta
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moving at constant speed.
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not moving.
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speeding up.
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slowing down.
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