Virtual Labs

ACCELERATION DUE TO GRAVITY AND TERMINAL VELOCITY

What force(s) act(s) on a free-falling object in vacuum?

a: Gravitational force only Explanation

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b: Gravitational force and drag force Explanation

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c: Drag force only Explanation

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d: Normal force and gravitational force Explanation

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Which equation represents the velocity of a free-falling object as a function of time?

a: v=−gt Explanation

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b: v=gt Explanation

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c: v=1/2(gt^2) Explanation

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d: v=1/2(gt) Explanation

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What determines the magnitude of the drag force experienced by an object falling through a fluid?

a: Velocity of the object only Explanation

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b: Projected area of the object only Explanation

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c: Coefficient of drag only Explanation

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d: All of the above Explanation

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What is the drag coefficient used to quantify?

a: The drag or resistance of an object in a fluid environment Explanation

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b: The acceleration due to gravity Explanation

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c: The density of the fluid Explanation

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d: The projected area of the object Explanation

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What is the condition for an object reaching terminal velocity in a fluid?

a: When the drag force exceeds the gravitational force Explanation

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b: When the gravitational force exceeds the drag force Explanation

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c: When the net force on the object is zero Explanation

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d: When the object is released from a height Explanation

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Which equipment is used to detect the passing of the object in the experiment?

a: Vernier calliper Explanation

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b: Electro-magnet Explanation

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c: Light gates Explanation

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d: Data logger Explanation

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What is the purpose of maintaining the cylindrical chamber in a vacuum?

a: To increase the air resistance Explanation

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b: To reduce the air resistance Explanation

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c: To measure the coefficient of drag Explanation

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d: To measure the acceleration due to gravity accurately Explanation

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How can the terminal velocity of the object be determined experimentally?

a: By measuring the time taken for the object to pass through each light gate Explanation

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b: By analyzing the velocity-time graph Explanation

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c: By calculating the projected area of the object Explanation

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d: By setting the electromagnet to different power levels Explanation

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