### Physics gravitation quiz

Choose the appropriate option.

#### Question 1. 1. A body attached to a spring balance weighs 10 kg on the earth. The body attached to the same spring balance is taken to a planet, where gravity is half that of the earth. The spring balance will read

 20kg (NA)

 10kg (NA)

 5 kg (NA)

 2.5kg (NA)

Choose the appropriate option.

#### Question 2. One feels heavier in a lift when the lift

 just begins to go up (NA)

 descends freely (NA)

Choose the appropriate option.

#### Question 3. Gravitational force shares a common feature with electromagnetic force. In both cases, the force is

 Between massive and neutral objects (NA)

 Between charged objects (NA)

 A short range (NA)

 A long range (NA)

Choose the appropriate option.

#### Question 4. The weight of an object may be assigned using Newton’s

 first law of motion (NA)

 second law of motion (NA)

 third law of motion (NA)

 laws of gravitation (NA)

Choose the appropriate option.

#### Question 5. A piece of paper and a coin both having the same mass are dropped from the 10th floor of a building. The piece of paper would take more time to reach the ground because

 gravitational pull on the paper is less than the coin (NA)

 buoyant force on the piece of paper is more than that on the coin (NA)

 buoyant force on the coin is more and acts in the downward direction (NA)

 the piece of paper takes a longer path to reach the ground (NA)

 Both the statements are individually true and statement II is the correct explanation of Statement I (NA)

 Both the statements are individually true but statement II is not the correct explanation of statement I (NA)

Choose the appropriate option.

#### Question 6. Planet A has doubled the radius than that of planet B. if the mass of planet A is 4 times heavier than the mass of planet B which of the following statements regarding weight of an object is correct?

 Heavier on planet A than on planet B (NA)

 Heavier on Planet B than on Planet A (NA)

 Same on both the planets (NA)

 Cannot be measured on Planet B (NA)

Choose the appropriate option.

#### Question 7. The radius of the moon is about one fourth that of the earth and acceleration due to gravity on the moon is about one sixth that on the earth. From this, we can conclude that the ratio of the mass of the earth to the mass of the moon is about

 10 (NA)

 100 (NA)

 1000 (NA)

 10000 (NA)

Choose the appropriate option.

#### Question 8. If the length of the equator is about 40000km and the velocity of rotation is about 1700km/h, then what would be the velocity of rotation at the pole?

 O (NA)

 850km/h (NA)

 1700km/h (NA)

 3400km/h (NA)

Choose the appropriate option.

#### Question 9. A body has a free fall from a height of 20m. After falling through a distance of 5m. then body would

 lose one fourth of its total energy (NA)

 lose one fourth of its potential energy (NA)

 gain one fourth of its potential energy (NA)

 gain three fourth of its total energy (NA)

Choose the appropriate option.

#### Question 10. Mass of a particular amount of substance I. Is the amount of matter present in it. II. Dos not vary from place to place III. Changes with change in gravitational force. Select the correct answer using the codes given below

 I, II and III (NA)

 both I and II (NA)

 Both II and III (NA)

 Only I (NA)

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