Apparent Weight

Q.

Astronauts feel weightless in International Space Stations due to zero gravity.

1. False

2. True

Q. A man in the lift weighs more, when the lift .

1. begins to go up
2. begins to go down
3. is in free fall

Q.

A boy weighing $600N$ is in a lift. If the lift experiences a breakdown and starts falling freely under the action of gravity, what would be the apparent weight of the boy in the lift?

1. $600N$

2. $0N$

3. $100N$

4. $400N$

Q. Weightlessness is a condition in which effective of the body becomes .

1. mass
2. weight
3. $zero$
4. $9.8N$

Q. Weightlessness experienced while orbiting the Earth in International Space Station, is the result of

1. zero gravity
2. free fall towards Earth
3. inertia

Q. Reason of weightlessness of any body in a satellite is zero .

1. gravity
2. mass
3. reaction force

Q. Weight and normal reaction forces constitute action reaction forces.

1. True
2. False

Q. The reaction force exerted by any surface on the body in contact is taken as apparent weight of the body.

1. True
2. False

Q. Match the following, according to the state of lift with the apparent weight of any person in lift.

1. $R>W$
2. $R=W$
3. $R<W$
4. $R=0$

Q. A person of mass m is in a lift which is accelerating upwards with an acceleration a. His apparent weight is

1. mg
2. m(g+a)
3. m(g-a)
4. m(g+2a)