15018104
Descrição
Quiz por Jeffrey Piggott, atualizado more than 1 year ago
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Criado por Jeffrey Piggott
aproximadamente 6 anos atrás
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Questão 1
Questão
A ball is dropped from a height of 1.3 m. The graph shows how the height above the ground varies with time for several bounces.
At 2.6 s the magnitude of the displacement from the starting position is:
Responda
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A 0.20 m
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B 0.60 m
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c 0.70 m
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D 1.30 m
Questão 2
Questão
How can the velocity of the ball at time t = 2.5 s be determined from the graph?
Responda
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A Calculate the area between the graph and the time axis up to t = 2.5 s.
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B Divide the displacement at t = 2.5 s by 2.5 s.
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C Divide the height at t = 2.5 s by 2.5 s.
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D Draw a tangent to the graph at t = 2.5 s and calculate its gradient.
Questão 3
Questão
A ball is thrown from position L and caught at position N.
L and N are the same height above the ground.
If vectors directed upwards are taken as positive, and air resistance is neglected, then the acceleration of the ball at L is -g and its speed is v.
Select the row of the table that correctly gives the acceleration and the speed of the ball as it reaches N.
Responda
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A
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B
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C
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D
Questão 4
Questão
A box is dropped from a plane flying at a constant velocity and height.
Assuming that air resistance is negligible, as the box falls to the ground its horizontal position will -
Responda
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A remain unchanged
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B lag behind the plane
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C move ahead of the plane
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D remain directly under the plane.
Questão 5
Questão
A ball launcher fires a ball horizontally of a lab bench. The paths of the ball after two launches are shown in the diagram.
Which of the following quantities are different for the two launches?
Responda
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A gravitational acceleration
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B time of flight
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C launch angle
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D initial velocity
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