Weightlessness

Q. During free fall , the body experiences weightlessness.

1. True
2. False

Q. Why are objects weightless, when they are in free fall ?

Q.

A block of mass 10 kg attached to a spring balance is released from rest. What will be the reading of the spring balance during free fall?

1. 100 N

2. 50 N

3. 10 N

4. 0

Q. A body of weight 600 N rests on the floor of a lift. If the lift begins to fall freely under gravity, what is the force applied by the body on the floor?

1. 600 N
2. 300 N
3. 250 N
4. 0 N

Q. Explain free fall of a body and derive the equations caused due to free fall

Q.

An object is said to be in a state of free fall when:

1. When the only force acting on it is the weight of the object.

2. All of these.

3. It accelerates under the force of gravity.

4. Initial velocity can be a zero or a non-zero value.

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.

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. $100N$

3. $0N$

4. $400N$