Question

A bungee jumper feels weightless as she falls toward the earth.what accounts for her weightless feeling when she fall freely?1. the force of gravity disappears when she has jumped off a high platform.2. her weight becomes less when she has jumped off.3. the weightless feeling is because of the lack of a support force that balances gravity.4. the platform is too high.

Answer 1

The feel of weight comes due to the normal reaction force given by the support. Hence, the condition of weightlessness is when the normal reaction force becomes zero. So, during free fall there is no support which can provide the normal reaction. Hence, the bungee jumper feels weightless as she falls towards the earth because of the lack of support force that balances gravity.

Hence, the answer is 3.

Answer 2

Answer:

3). the weightless feeling is because of the lack of a support force that balances gravity.

Explanation:

As we know that the bungee jumper is feeling weightlessness when he jumps from the platform.

This is because when the jumper is standing on the platform then the normal force due to floor is balancing the weight of the person

so it is given as

$F_n = mg$

Now when he jumps from the platform there is no force which will counter balance the weight of the jumper

So here jumper will start moving downwards with an acceleration equal to the acceleration due to gravity

So here since there is no support so the jumper will not feel any weight

so correct answer will be

3). the weightless feeling is because of the lack of a support force that balances gravity.