Solving for Projectile Motion: Initial Velocity, Angle, Time, and Distance

  • Thread starter Thread starter poohead
  • Start date Start date
  • Tags Tags
    Motion
poohead
Messages
34
Reaction score
0

Homework Statement


A body is projected upward from the level ground at an angle 50 degrees with the horizontal has an initial speed of 40 m/s.
A) how long will it be before it hits the ground?
B) How far from the starting point will it strike??
C) At what angle with the horizontal will it strike??


Homework Equations





The Attempt at a Solution



fatal

please help
 
Physics news on Phys.org
PH, you probably need to put a bit more into this problem before asking for help. Surely you can come up with the relevant equations, or at least take a stab at them. Try drawing a free body diagram, and then write the equations of motion for the body.
 
Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
Back
Top