Variation of Weight

Q.

why is weight a vector quantity ?..plz explain conceptually

Q.

What is the difference between mass and weight of an object. Will the mass of an object on the earth be same as their values on Mars? And why??

Q. Uniform metre scale is balance that 40 cm mark when weight of 20 gf and 5 gf are suspended at 5 cm and 75 cm respectively. calculate the weight of metre scale

Q.

Question 1
What are the differences between the mass of an object and its weight?

Q.

The measurement of a physical quantity consists of two parts, magnitude and ______________

Q.

What are the differences between the mass of an object and its weight? [5 MARK]

Q.

All bodies lose their weight at the center of earth. Why ?

Q.

Of the following where would the weight of an object would be the least?

1. 2000 miles above earth’s surface

2. At north pole

3. At equator

4. At center of earth

Q.

Which of the following statement(s) is/are correct about the weight of a body?

1. Weight is a vector quantity.

2. S.I Unit of weight is newton(N).

3. The weight of a body is constant anywhere in the universe.

4. Weight is the gravitational force exerted on a body.

Q. A weighing scale measures 600 N when Arun stands on both his feet to measure his weight. What would be the new reading if he lifts one of his legs in the air, while still standing over the same weighing scale?

1. 600 N
2. 300 N
3. 0 N
4. > 600 N

Q.

If the acceleration due to gravity on Mars is more than that of Earth, then the weight of the object on Mars will be

1. less

2. more

3. same

4. cannot be determined

Q. If hypothetically, an object reaches to the center of the Earth, its weight ____________.

1. will become infinite
2. will remain same as on the surface
3. will become zero
4. cannot be measured

Q. For moon, $g=1.67m{s}^{-2}$ and $R=1.74\times {10}^{6}m$.
The Moon's mass is ___ $\times {10}^{22}kg$.

1. 7.6

Q. Why does a man feels whightless on an natural satelite?

Q.

Gravitational force is proportional to the product of the_____ and inversely proportional to the square of _____ between two bodies.

1. masses, displacement

2. masses, distance

3. weights, displacement

4. weights, distance

Q.

What is the difference between mass and weight

Q. Miranda, one of the moons of the planet Uranus, orbits the planet with an average speed of $6.5\text{km}{\text{s}}^{-1}$, while experiencing a centripetal force of $2\times {10}^{19}\text{N}$. What is the distance (in $\text{km}$) between Uranus and Miranda, if the moon has a mass of $6.4\times {10}^{19}\text{kg}$?

1. 135200

Q. Two masses $4\text{g}$ and $12\text{g}$, are placed horizontally at a distance of $12\text{cm}$ from each other. Another mass of $0.5\text{g}$ is placed in between them such that there is no net force acting on it. Find the distance (in $\text{cm}$) of the third mass from the mass of $4\text{g}$.

1. $+6+6\sqrt{3}\text{cm}$
2. $+6-6\sqrt{3}\text{cm}$
3. $-6+6\sqrt{3}\text{cm}$
4. $6\sqrt{3}\text{cm}$

Q.

What fraction of Earth's gravity is the Moon's gravity?

1. Three-fourths

2. One-sixth

3. One-half

4. Two-thirds

Q. Miranda, one of the moons of the planet Uranus, orbits the planet with an average speed of $6.5\text{km}{\text{s}}^{-1}$, while experiencing a centripetal force of $2\times {10}^{19}\text{N}$. What is the distance (in $\text{km}$) between Uranus and Miranda, if the moon has a mass of $6.4\times {10}^{19}\text{kg}$?

1. 135200