Weight on Moon

Q.

Why does a man weigh less on the moon than on the Earth?

1. Mass of the moon is less than the Earth, therefore, the force of attraction is less.

2. Mass of the moon is more than the Earth, therefore, the force of attraction is more.

3. Mass of the moon is equal to that of the Earth.

4. Can't be said.

Q.

Moon does not have an atmosphere.

1. True

2. False

Q. Question 20
The weight of any person on the moon is about $\frac{1}{6}$ times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?

Q. Find the free-fall acceleration of an object on the surface of the moon, if the radius of the moon and its mass are $1740km$ and $7.4\times {10}^{22}$ kg respectively. Take $G=6.67\times {10}^{-11}N{m}^{2}k{g}^{-2}$

1. $1.63m{s}^{-2}$
2. $1.83m{s}^{-2}$
3. $10m{s}^{-2}$
4. $9.8m{s}^{-2}$

Q.

How much will a 70 kg mass weigh on the moon? Take $g_{moon}=1.63m/s^2$

Q. Weight of the body on Earth is $W$, then weight of the same body on Moon would be.

1. $\frac{W}{6}$
2. $\frac{W}{3}$
3. $\frac{W}{2}$

Q. If the acceleration due to gravity on the surface of the earth is $9.8m/s^2$, what will be the acceleration due to gravity on the surface of a planet whose mass and radius both are two times the corresponding quantities for the earth ?

1. $4.9m/s^2$
2. $9.8m/s^2$
3. $19.8m/s^2$
4. None of the above

Q.

A body weighs 100 N on the surface of Earth. What will be the acceleration due to gravity acting on the body at a height of 3400 km above Earth's surface? Taking the mass of Earth$=6\times {10}^{24}kg$, Radius of earth$=6.4\times {10}^{6}m$ and $G=6.7\times {10}^{-11}N{m}^{2}k{g}^{-2}$.

1. $6.18m{s}^{-2}$

2. $9.8m{s}^{-2}$

3. $6m{s}^{-2}$

4. $4.18m{s}^{-2}$

Q. If a rock is brought from the surface of the Moon, the weight of the rock changes but the mass remains same.

1. True
2. False

Q. The atmosphere is held to Earth due to _________.

1. clouds
2. wind
3. gravity
4. magnetic field

Q.

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

1. $\frac{5}{6}kg$

2. $5kg$

3. $10kg$

4. $30kg$

Q. Mass remains constant everywhere on Earth but changes on Moon.

1. True
2. False

Q.

A boy weighs $600N$ on the Earth. What would be his weight on the moon?

1. 600 N

2. 100 N

3. can't be said

4. 0

Q.

Weight of an astronaut and his space suit on the Earth is $60kgf$ and $30kgf$ respectively. Their combined weight on the Moon will be:

1. $20kgf$

2. $15kgf$

3. $5kgf$

4. $10kgf$

Q.

A body weighs 100 N on the surface of Earth. What will be the acceleration due to gravity acting on the body at a height of 3400 km above Earth's surface? Taking the mass of Earth$=6\times {10}^{24}kg$, Radius of earth$=6.4\times {10}^{6}m$ and $G=6.7\times {10}^{-11}N{m}^{2}k{g}^{-2}$.

1. $6.18m{s}^{-2}$

2. $9.8m{s}^{-2}$

3. $6m{s}^{-2}$

4. $4.18m{s}^{-2}$

Q. The radii of two planets are $R_1$ and $R_2$ respectively and their densities are ${\rho }_1$ and ${\rho }_2$ respectively. The ratio of the accelerations due to gravity $\frac{g_1}{g_2}$ at their surfaces is

1. $\frac{R_1{\rho }_2}{R_2{\rho }_1}$
2. $\frac{R_1{\rho }_1}{R_2{\rho }_2}$
3. $\frac{{\rho }_1{R}_2^2}{{\rho }_2{R}_1^2}$
4. $\frac{{R_{1}R}_2}{{\rho }_1{\rho }_2}$

Q. The atmosphere is held to Earth due to _________.

1. magnetic field
2. wind
3. gravity
4. clouds

Q.

A person can lift the maximum of $15kg$ on the Earth. If the moon's gravity is $\frac{1}{6}th$ of the Earth, what will be the maximum mass he can lift?

1. $70kg$

2. $80kg$

3. $90kg$

4. $60kg$

Q. If a rock is brought from the surface of the Moon, the weight of the rock changes but the mass remains same.

1. True
2. False

Q.

Weight of an astronaut and his space suit on the Earth is $60kgf$ and $30kgf$ respectively. Their combined weight on the Moon will be:

1. $15kgf$

2. $10kgf$

3. $5kgf$

4. $20kgf$

Q.

What is the weight of a block of mass$10.5\mathrm{k}\mathrm{g}$? Take $g=10\mathrm{m}{\mathrm{s}}^{-2}$