What will be the weight of a person on the earth, who weighs 9N on the moon?
- A3 N
- B15 N
- C45 N
- ✓54 N
Answer: D.
View full solution →Question types
P-1 Gravitation question types
238 questions across 12 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
238
Questions
12
Question groups
5
Question types
01
M.C.Q
31 Q→02Answer the following questions:[1 M]
30 Q→03Give scientific reasons: [2 M]
3 Q→04Answer the following questions: [2 M]
53 Q→05Answer the following questions: [3 M]
9 Q→06Answer the following questions: [5 M]
12 Q→07Write True or False
15 Q→08Do As Directed.
41 Q→09Fill in the blanks.
32 Q→10Find An Odd One Out
10 Q→11Distinguish Between :
1 Q→12Match the following.
1 Q→Sample Questions
P-1 Gravitation questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
How much will a person with 72 N weight on the earth, weigh on the moon?
- ✓12 N
- B36 N
- C21 N
- D63 N
Answer: A.
View full solution →The escape velocity of a body from the earth’s surface, $v_{sec}$ = …….
View full solution →The SI unit of the universal constant of gravitation is ……
- ✓$N \cdot m ^2 / kg ^2$
- BN.kg ${ }^2 / m ^2$
- C$m / s ^2$
- D$kg \cdot m / s ^2$
Answer: A.
View full solution →In the usual notation, the acceleration due to gravity at a height h from the surface of the earth is ……..
If area ESF in figure 1.5 is equal to area ASB, what will you infer about EF?
Will your weight remain constant as you go above the surface of the earth?
What will be the value of g at the centre of the earth?
Will the direction of the gravitational force change as we go inside the earth?
What would happen if the value of G was twice as large?
With a specific initial velocity, we can jump higher on the moon than on the earth.
The weight of a body is different on different planets
If a feather and a stone are released from the top of a building simultaneously, the stone reaches the ground earlier than the feather.
The gravitational force due to the earth also acts on the moon because of which it revolves around the earth. Similar situation exists for the artificial satellites orbiting the earth. The moon and the artificial satellites orbit the earth. The earth attracts them towards itself but unlike the falling apple, they do not fall on the earth, why?
According to Newton’s law of gravitation, every object attracts every other object.
Thus, if the earth attracts an apple towards itself, the apple also attracts the earth towards itself with the same force. Why then does the apple fall towards the earth, but the earth does not move towards the apple?
Thus, if the earth attracts an apple towards itself, the apple also attracts the earth towards itself with the same force. Why then does the apple fall towards the earth, but the earth does not move towards the apple?
According to Newton’s law of gravitation, the earth’s gravitational force is higher on an object of larger mass. Why doesn’t that object fall down with higher velocity as compared to an object with lower mass?
Suppose you are standing on a tall ladder. If your distance from the centre of the earth is 2R, what will be your weight?
Write the proper answer in the square.
If F = $\frac{G m_{1} m_{2}}{d^{2}}$,
then F =
View full solution →
If F = $\frac{G m_{1} m_{2}}{d^{2}}$,
then F =
If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?<
A stone thrown vertically upwards with initial velocity u reaches a height ‘h ’before coming down. Show that the time taken to go up is same as the time taken to come down.
what are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force?
What is the difference between mass and weight of an object? Will the mass and weight of an object on the earth be the same as their values on Mars? Why?
What are Newton’s laws of motion?
Explain why the value of g is zero at the centre of the earth
Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?
Using the law of conservation of energy, obtain the expression for the escape velocity
Explain the factors affecting the value of $g.$
View full solution →From Newton’s law of gravitation, derive the formula for the acceleration due to gravity
At the height of 'h' from the ground, the gravitational potential energy is $\frac{- GMm }{ R + h }$.
View full solution →The mass of the Earth is $6.4 \times 10^6 \ kg$.
View full solution →Weight is a vector quantity.
Beyond the surface of the Earth, g $\alpha \frac{1}{(R+h)^2}$.
View full solution →Mass is a scalar quantity.
Compete the analogy :
Force : Vector : : Weight : __________.
Force : Vector : : Weight : __________.
Compete the analogy :
Force : ma : : Gravitational force : __________.
Force : ma : : Gravitational force : __________.
Compete the analogy :
Kinetic energy : $\frac{1}{2} mv ^2$ : : Potential energy : __________.
View full solution →Kinetic energy : $\frac{1}{2} mv ^2$ : : Potential energy : __________.
Compete the analogy :
Shape of the Earth at equator : Bulged : : Shape of the Earth at poles : __________.
Shape of the Earth at equator : Bulged : : Shape of the Earth at poles : __________.
Compete the analogy :
At poles : $9.83 m/s^2 : :$ At equator : __________.
View full solution →At poles : $9.83 m/s^2 : :$ At equator : __________.
Formula for centripetal force is __________.
During ascent __________ is zero and during descent __________ is zero.
Gravititional waves are detected by __________.
$v _{ esc }=$ __________.
View full solution →The energy possessed because of position or configuration is called __________.
$9.83 \ m/s^2, \ 98.3 \ m/s^2, \ 983 \ m/s , \ 98.03 \ m^2s$
View full solution →$983 \ cm/s^2 , \ 977 \ cm/s^2 , \ 980 \ cm/s^2 , \ 9.83 \ m/s^2$
View full solution →Newton, Ohm, Kepler, Galileo
Newton's first law, Newton's law of gravity, Newton's third law, Newton's second law
Weight, Thrust, Force, Pressure
Observe the figure and answer the following questions
Question
(i) What are the masses of the objects shown?
(ii) What is the distance between their centres?
(iii) Write gravitational force between them.
(iv) Why gravitation constant is called universal constant?
(v) What will happen to gravitational force if mass of one of the objects is doubled?
(vi) What is the value of universal constant in SI?
Question
(i) What are the masses of the objects shown?
(ii) What is the distance between their centres?
(iii) Write gravitational force between them.
(iv) Why gravitation constant is called universal constant?
(v) What will happen to gravitational force if mass of one of the objects is doubled?
(vi) What is the value of universal constant in SI?
| Place | Altitude from the Earth’s surface (km) | g$\left( m / s ^2\right)$ |
| (i) Surface of Earth | 0 | |
| (ii) Mount Everest | 8.8 | |
| (iii) Altitude attained by Man-made balloon | 36.6 | |
| (iv) Orbit of space shuttle | 400 | |
| (V) Communication satellite | 35700 |
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