true or false

Question 11 Mark

State true/ false. If false, correct the statement: “Earth exerts a greater force of attraction on apple than apple exerts on the earth.”

Answer

False.
Explanation: Earth exerts the force of attraction on apple equal to the force apple exerts on the earth.

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Question 21 Mark

The following statements are true or false: The value of $G$ on the moon is about one-sixth $\big(\frac{1}{6}\big)$ of the value of G on the earth.

Answer

False.

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Question 31 Mark

The following statements are true or false:
The force of gravitation between two objects depends on the nature of medium between them.

Answer

False.

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Question 41 Mark

The following statements are true or false: The acceleration due to gravity acting on a freely falling body is directly proportional to the mass of the body.

Answer

False.

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Question 51 Mark

State whether the following statements are true or false: The buoyant force depends on the nature of object immersed in the liquid.

Answer

False.

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Question 61 Mark

The following statements are true or false: A falling stone also attracts the earth.

Answer

True.

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Question 71 Mark

Weight is a vector quantity and mass is a scalar quantity. [True/ False]

Answer

True.
Explanation:
Weight is a force which is a vector and has a magnitude and direction. Mass is a scalar. Weight and mass are related to one another, but they are not the same quantity. Mass and energy are scalar quantities, while momentum is a vector quantity.

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Question 81 Mark

The following statements are true or false: Tire weight of an object on the earth is about one-sixth of its weight on the moon.

Answer

False.

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Question 91 Mark

Ships and submarines are designed on the basis of Archimedes Principle. [True/ False]

Answer

True.
Explanation: Archimedes principle states that "when an object is immersed in liquid it feels the loss of weight" the amount of weight loss is equal to the amount of water displaced and its weight so ship displaces its own weight on water.

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Question 101 Mark

State whether the following statements are true or false: 'Archimedes’ principle can also be applied to gases.

Answer

True.

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Question 111 Mark

Acceleration due to gravity reduces as one goes from pole to equator. [True/ False]

Answer

True.
Explanation:
This means that the centripetal acceleration at the Equator is about $0.03m/ s^2$ (metres per second squared). This has the effect of slightly increasing your weight at the poles (since you are close to the centre of the Earth and the gravitational force depends on distance) and slightly decreasing it at the equator.

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