Weight

Q. Why do we feel weightlessness during free fall?

Q. A boy have a mass of 50 kg. Taking $g=10m{s}^{-2}$, his weight on the Earth would be.

1. 0 N
2. 600 N
3. 500 N

Q. On what factors does weight depends

Q.

A boy having a mass of 50 kg. What would be his weight on the Earth? (g = 10 m/s²)

1. 500 N

2. 600 N

3. 700 N

4. 800 N

Q.

What is the weight of an object of mass $1kg?$

Q. A coin and a piece of paper are dropped simultaneously from the same height . which of them will touch the ground first and why?

Q. How much gravitational force do we exert on the earth?

Q.

A boy weighing 600 N was in a lift. If the lift started falling freely under the action of gravity, his apparent weight would be.

1. 0 N
2. 100 N
3. 600 N

Q.

In which of the following conditions will the weight of a body would not be zero

A. At the centre of the earth

B. During a free fall

C. In interplanetary space

D. On a frictionless surface

Q.

What is the value of the acceleration due to gravity at the centre of earth?

1. Can not be determined
2. Infinite
3. 0 m/s ${}^2$
4. Greater than that at surface

Q.

Where will be the true weight of the body be zero?

Q.

The force of gravitation between two bodies in the universe does not depend on:

1. the distance between them

2. the product of their masses

3. the sum of their masses

4. gravitational constant

Q.

Consider a heavenly body which has a mass twice that of the earth and a radius thrice that of the earth. The weight of a book on this heavenly body, if its weight on the earth is $900\mathrm{N}$ will be :

1. $400N$

2. $600N$

3. $500N$

4. $200N$

Q.

What do you mean by weight of a body ? State the S.I unit of weight .

Q. Question 12
The weight of an object at the center of the earth of radius R is

(a) zero
(b) infinite
(c) R times the weight at the surface of the earth
(d) $\frac{1}{R^2}$ times the weight at surface of the earth

Q. Acceleration due to gravity at poles is ___ than/as that at equator.

1. half
2. same
3. greater
4. lesser

Q. Question 2
The value of acceleration due to gravity

(a) is same on equator and poles
(b) is least on poles
(c) is least on equator
(d) increases from pole to equator

Q.

Is our weight zero when we are going down in an escalator.If yes , why?

Q.

1) wat does it mean by apparent weight ??

2) a man of weight W is standing on a lift which is moving with a accelration a. what the apparent weight of the man ??

Q. A stone of weight w is thrown vertically upward into air from the ground level with initial speed Vo. if a constant force f due to air drag act on the stone throughout its flight . what will be the maximum height attained by the stone ?

Q. Milli equivalent of 10ml h2s04 whose specific gravity is 1.2 and it is 49 percent by weight

Q.

A boy was standing on a weighing scale in a lift, it showed a reading of 600 N. The lift experienced a breakdown and started falling freely under the action of gravity, what would be the reading of the weighing scale?

1. 100 N

2. 600 N

3. 0

4. can't be said

Q.

The force of gravitation between two bodies in the universe does not depend on:

1. the distance between them

2. the product of their masses

3. the sum of their masses

4. gravitational constant

Q. A man weighs 600 N on the equator, but when he moves to pole he finds a slight increase in his weight. This is because of the of Earth.

1. change in radius
2. rotation
3. revolution

Q. Question 2
What do you mean by acceleration due to gravity?

Q.

Person $A$ has more mass more than person $B$. Person ___ will experience more gravitational force.

Q. 1. Weight of an object on the moon is 1/6th of its weight on the earth. True or False?
2. How much would a 70 kg man weigh on the moon? What would be his mass on the earth and on the moon? (Acceleration due to gravity on moon $=1.63m/s^2$)
[3 MARKS]

Q.

What is accuracy and precision? With examples.

Why do we take averages when there are more than one experiment ?

Q. The acceleration due to gravity is more at the Poles than at the Equator.

1. True
2. False

Q. Acceleration due to gravity at poles is ___ than/as that at equator.

1. lesser
2. same
3. half
4. greater