Abungee 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.

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

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.

c

explanation:

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s