Weight and Mass of a Body

Q. The gravitational force on the surface of the moon is only $\frac{1}{6}$ as strong as gravitational force on the earth. The weight in newtons of a 10 kg object on the moon is 20 N.

1. True
2. False

Q.

Define density. what are the factors on which density depends?

Q. Weight is a measure of the force of _________ on an object.

1. Mass
2. Density
3. Gravity
4. Velocity

Q.

The pressure gradients dimensions are

1. ${\mathrm{ML}}^{-2}{\mathrm{T}}^{-2}$

2. ${\mathrm{ML}}^2{\mathrm{T}}^{-1}$

3. ${\mathrm{ML}}^{-1}{\mathrm{T}}^{-1}$

4. ${\mathrm{ML}}^{-1}{\mathrm{T}}^{-2}$

Q.

Apparent loss in weight is caused due to

Q.

Define mass.

Q.

An astronaut has 80 kg mass on earth :
(a) What is his weight on earth?

Q.

Explain the application of Archimedes’ principle in submarines.

Q.

Mass of an object is $7kg$. What is its weight on the earth?

Q.

An oil of relative density $1.2$ and volume $1\mathrm{litre}$ is poured in water. Find the mass of the oil.

Q.

The mass of an empty density bottle is 24 g. Its mass is 60 g when the bottle is completely filled with water and 45 g when filled completely with an unknown liquid . Find the following :

a) volume of bottle

b) density of unknown liquid

c) Relative density of unknown liquid

Q. If the mass of a ball is 5 kg on the Earth, then what would be its mass on Jupiter?

1. 5/6 kg
2. 5 kg
3. 10 kg
4. 30 kg

Q. Which of the following statement is incorrect regrading the mass of a body?

1. Mass of a body is defined as the quantity of matter contained in it.
2. Mass of a body can change.
3. Mass of a body remains constant.
4. Mass of a body can not be zero.

Q. The mass of a basketball on the earth is taken as 60 kg. What will be the weight of that basketball on moon?
Take acceleration due to gravity on earth to be $10m{s}^{-2}$.

1. $100N$
2. $10kg$
3. $600N$
4. $60kg$

Q.

The density of a substance is equal to

1. its relative density$+$density of water

2. its relative density$/$density of water

3. its relative density$\times$density of water

4. its relative density$-$density of water

Q. A man weighs 600 N on the earth. If he was taken to the moon, his weight would be 100 N. What is the acceleration due to gravity on the moon? (Take $g=10m{s}^{-2}$)

1. $2.66m{s}^{-2}$
2. $1.66m{s}^{-2}$
3. $0.66m{s}^{-2}$
4. $1m{s}^{-2}$

Q.

A body of mass $1.0kg$ is falling with an acceleration of $10m{s}^{-2}$. Its apparent weight will be ($g=10m{s}^{-2}$)

1. $1.0kg$

2. $2.0kg$

3. $0.5kg$

4. $0kg$

Q. The weight of a body at a specific place is $20N$. The acceleration due to gravity at that point is $10m{s}^{-2}$. What is the mass and weight of the object at the centre of Earth?

1. $2kg,10N$
2. $2kg,0N$
3. $2kg,20N$
4. $2kg,2N$

Q.

Why does the mass of a body remain the same throughout the universe?

Q. A boy is having a mass of 50 kg. What would be his weight on the Earth?
$g=10m/s^2$

1. $500N$
2. $800N$
3. $600N$
4. $700N$

Q. If the mass of a body is $5kg,$ its weight on the surface of the earth would be ___. [Take acceleration due to gravity, $g=9.8m{s}^{-2}]$

1. $50N$
2. $49N$
3. $100N$
4. $98N$

Q.

Solid will sink in a liquid if its density is ________ than the density of the liquid. (lower/greater)

Q.

Answer in one word:

A special bottle used for determining the relative density of a liquid.

Q.

Objects having a density less than that of the liquid in which they are immersed, ______ on the surface of the liquid.

Q. A man weighs 600 N on the earth. What is his mass? (take $g=9.8m{s}^{-2}$). If he were taken to the moon, his weight would be 100 N. What is his mass on the moon? What is the acceleration due to gravity on the moon? [3 MARKS]

Q. The maximum mass that Rahul can lift on the Earth is 42 kg. What will be the maximum mass that he can lift on the Moon?
Given that $g_{Moon}$ = (1 /6) $\times g_{Earth}$

Q. What is the value of acceleration due to gravity on the moon?

1. $\frac{g}{4}$
2. $\frac{g}{5}$
3. $\frac{g}{6}$
4. $\frac{g}{2}$

Q.

When a body is floating in a liquid :

1. the weight of body is less than the upthrust due to immersed part of body

2. the weight of body is more than the upthrust due to immersed part of body

3. the weight of body is equal to the upthrust due to immersed part of body

4. none of the above

Q.

Weight of an object has S.I. unit of :

1. N

2. Kg/N

3. Kg

4. N/Kg

Q. If a rock is brought to Earth from the surface of the moon, then __

1. its mass will change.
2. both mass and weight will remain the same.
3. both mass and weight will change.
4. its weight will change but not mass.