Free Fall vs Jetpack: Will He/She Stay Afloat?

AI Thread Summary
A person falling from the sky has a weak jetpack that can only generate an upward force equal to gravitational force (Fg). The discussion centers on whether the individual will stay afloat or crash, depending on how the thrust is aimed. The lack of specific acceleration details complicates the analysis of the situation. Participants note that the question requires more information to determine the outcome accurately. The thread has been closed due to a request for proper posting in the Homework Help forums.
Dhruvish
Messages
7
Reaction score
0
There is a random person falling from the sky. He remembers that he has a jetpack. Unfortunately, his jetpack is weak and is only able to provide upward force equivalent to Fg.

WILL HE?SHE STAY AFLOAT OR WILL HE?SHE CRASH INTO THE GROUND?
What acceleration will he/she hit the ground?
 
Physics news on Phys.org
Dhruvish said:
What acceleration will he/she hit the ground?
Depends on which way he/she aims the thrust.
 
the thing is the question does not specify at all the acceleration its just an upwards force?
 
Thanks for your help
 
New user has been asked to repost in the Homework Help forums and to fill out the HH Template provided there. This thread is closed.
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Thread 'Beam on an inclined plane'
Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
Back
Top