Weightlessness

Q.

While orbiting the earth in spaceship, weightlessness experienced is the result of _________.

1. Inertia
2. Acceleration
3. Zero gravity
4. Free fall towards earth

Q. If you experience weightlessness, then your weight is zero.

1. True
2. False

Q.

An object in a satellite experiences weightlessness.

1. True
2. False

Q.

The minimum speed required by a rocket to put a satellite in space is :

1. $11.2km/s$

2. $11.2m/s$

3. $11.2miles/h$

4. $11.2km/min$

Q. For what purpose we use -height

Q.

A body of mass m kg. starts falling from a point 2R above the earth’s surface. Its kinetic energy when it has fallen to a point ‘R’ above the eart’s surface [R – Radius of earth, M – Mass of earth, G – Gravitational constant]

1. $\frac{1}{2}\frac{GMm}{R}$

2. $\frac{1}{3}\frac{GMm}{R}$

3. $\frac{1}{6}\frac{GMm}{R}$

4. $\frac{2}{3}\frac{GMm}{R}$

Q.

a parrot is sitting on the floor of a closed glass cage which is in boys hand the parrot starts flying with a constant speed .the boy will feel weight unchanged.explain in detail

Q.

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

1. Inertia

2. Acceleration

3. Zero gravity

4. Free fall towards earth

Q.

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

1. True

2. False