A metal in which even iron can float is:
- ASodium.
- BMagnesium.
- ✓Mercury.
- DManganese.
Answer: C.
View full solution →Question types
Gravitation question types
190 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
190
Questions
7
Question groups
5
Question types
01
M.C.Q. [1 M]
24 Q→02true or false
7 Q→03Fill in the blank
13 Q→04Do as directed; [1 M ]
62 Q→05Que-Ans (Each of 2 Mark )
54 Q→06Que-Ans (Each of 3 Mark )
20 Q→07Que-Ans (Each of 5 Mark )
10 Q→Sample Questions
Gravitation questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Two objects of different masses falling freely near the surface of moon would:
- ✓Have same velocities at any instant.
- BHave different accelerations.
- CExperience forces of same magnitude.
- DUndergo a change in their inertia.
Answer: A.
View full solution →Consider the following information in respect of four objects $A, B, C$ and $D:$
Which object would float on water$?$
| Object | Density $(kg/m^3)$ | Volume $(m^3)$ | Mass $(kg)$ |
| $A$ | $-$ | $2$ | $4000$ |
| $B$ | $8000$ | $4$ | $-$ |
| $C$ | $2000$ | $-$ | $1000$ |
| $D$ | $-$ | $4$ | $2000$ |
- A$A$
- B$B$
- C$C$
- ✓$D$
Answer: D.
View full solution →A solid of density $900 \mathrm{~kg} / \mathrm{m}^3$ floats in oil as shown in the given diagram. The oil floats on water of density $1000 \mathrm{~kg} / \mathrm{m}^3$ as shown. The density of oil in $\mathrm{kg} / \mathrm{m}^3$ could be:
- A$850$
- B$900$
- ✓$950$
- D$1050$
Answer: C.
View full solution →An object is thrown vertically upwards with a velocity $u,$ the greatest height h to which it will rise before falling back is given by:
- A$\frac{\mu}{\text{g}}$
- ✓$\frac{\mu^2}{2\text{g}}$
- C$\frac{\mu^2}{\text{g}}$
- D$\frac{\mu}{2\text{g}}$
Answer: B.
View full solution →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.
View full solution →The following statements are true or false: The force of gravitation between two objects depends on the nature of medium between them.
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.
The acceleration due to gravity acting on a freely falling body is directly proportional to the mass of the body.
State whether the following statements are true or false: The buoyant force depends on the nature of object immersed in the liquid.
The following statements are true or false:
A falling stone also attracts the earth.
A falling stone also attracts the earth.
Fill in the following blanks with suitable word: If the weight of a body is $6N$ on the moon, it will be about $...........$ on the earth.
View full solution →Fill in the following blanks with suitable word: The weight of an object on the earth is about $...........$ of its weight on the moon.
View full solution → Fill in the following blanks with suitable word:
The weight of an object on the moon is about ________ of its weight on the earth.
The weight of an object on the moon is about ________ of its weight on the earth.
Fill in the following blanks with suitable word:
If the area of a snow shoe is five times ______ than the area of an ordinary shoe, then the pressure of a snow shoe on the snow is five times _______.
If the area of a snow shoe is five times ______ than the area of an ordinary shoe, then the pressure of a snow shoe on the snow is five times _______.
Fill in the following blanks with suitable word:
In order to sink in a fluid, the density of an object must be _____ than the ______ of the fluid.
In order to sink in a fluid, the density of an object must be _____ than the ______ of the fluid.
lire relative density of mercury is $13.6.$ What does this statement mean$?$
View full solution →Name these force: The upward push of water on a submerged object.
What is the other name of buoyant force?
Name the force which makes heavy objects appear light when immersed in a liquid.
What is the weight of a $1$ kilogram mass on the earth$? (g = 9.8 \mathrm{~m} / \mathrm{s}^2).$
View full solution →A stone and the earth attract each other with an equal and opposite force. Why then we see only the stone falling towards the earth but not the earth rising towards the stone?
Explain why, buildings and dams have wide foundations.
Define thrust. What is its unit?
When does an object float or sink when placed on the surface of a liquid?
The density of gold is $19\ g/cm^3.$ Find the volume of $95\ g$ of gold.
View full solution →A stone is thrown vertically upwards with a speed of $20 \mathrm{~m} / \mathrm{s}$. How high will it go before it begins to fall? $\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2\right)$
View full solution →A stone is dropped from a height of $20\ m.$ What will be its speed when it hits the ground$? (g = 10\ m/s^2)$
View full solution →Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.
What is the difference between the density and relative density of a substance?
$5\ kg$ of material $A$ occupy $20\ cm^3$ whereas $20\ kg$ of material $B$ occupy $90\ cm^3.$ Which has the greater density: $A$ or $B?$ Support your answer with calculations.
View full solution →If the distance between two masses is increased by a factor of $5,$ by what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?
View full solution →Universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, why don’t we notice such forces? Why don’t the two objects in a room move towards each other due to this force?
The mass of a planet is $6 \times 10^{24}\ kg$ and its diameter is $12.8 \times 10^3\ km.$ If the value of gravitational constant be $6.7 \times 10^{-11}\ Nm^2/\ kg^2,$ calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be$?$
View full solution →- How does a boat float in water?
- A piece of steel has a volume of $12\ cm^3,$ and a mass of $96\ g$. What is its density: $(i)$ in $g/cm^3$ $(ii)$ in $kg/m^3?$
Write the differences between mass and weight of an object.
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