Calculating Rocket Height for 1/100 Weight on Earth's Surface?

  • Thread starter Thread starter Stratosphere
  • Start date Start date
AI Thread Summary
To determine the height above Earth's surface where a rocket experiences 1/100 of its normal weight, one must apply the formula for gravitational force, which decreases with distance from the Earth's center. The discussion emphasizes the importance of attempting to solve the problem independently before seeking assistance. Participants are encouraged to reference previous threads for guidance on similar physics problems. The forum promotes a collaborative learning environment rather than providing direct solutions. Engaging with the problem is essential for understanding the underlying physics concepts.
Stratosphere
Messages
373
Reaction score
0
Can anybody solve this problem?

How high above the surface of the Earth should a rocket be
in order to have 1/100 of its normal weight? Express your answer
in units of Earth radii.

(Please include work)
 
Physics news on Phys.org
This isn't that kind of a forum. You have to try and solve the problem first and then we give help. That's all. No one is supposed to solve problems for you. Give it a try. It's not that hard. What formula might you want to use?
 
look at the other thread of mine called Need Help its on the first page on introductory physics.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Time dilation and length contraction for a rocket
Replies
12
Views
3K
What are the forces on a cell in a tree vs on the surface of a tree
Replies
4
Views
1K
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
Replies
2
Views
790
True vs. Apparent weight question
Replies
10
Views
4K
A rocket going up with acceleration =
Replies
2
Views
4K
Need help finding energy for escape velocity
Replies
5
Views
3K
How Long for a Beam of Light to Reach Earth?
Replies
21
Views
1K
Gravitational force equation help
Replies
26
Views
3K
A rocket burns out at an altitude h above the Earth's surface
Replies
2
Views
2K
Calculating Energy Ratios: Moving Mass to and from Earth's Core
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top