Help with problem, only given maximum height and range

AI Thread Summary
To solve the problem of determining the launch angle and speed of a rocket that reaches a height of 72.3 meters and a maximum range of 111 meters, one can use projectile motion equations. The maximum height can be calculated using the formula h = (v^2 * sin^2(θ)) / (2 * g), while the range can be determined with R = (v^2 * sin(2θ)) / g. By combining these equations, it is possible to derive the launch angle and speed. Participants in the discussion encourage sharing any attempted methods or relevant equations to facilitate problem-solving. Engaging with the equations of motion is crucial for finding the solution.
darealprince
Messages
10
Reaction score
0
Hello i need help with this problem where i am only given the maximum height and range. The problem is that a rocket reaches a height of 72.3 meters and had a maximum range of 111 meters. What is the launch angle? and what is the launch speed?
Does anybody know how to solve it
 
Physics news on Phys.org
Welcome to PF!

darealprince said:
Hello i need help with this problem where i am only given the maximum height and range. The problem is that a rocket reaches a height of 72.3 meters and had a maximum range of 111 meters. What is the launch angle? and what is the launch speed?
Does anybody know how to solve it

Hi darealprince! Welcome to PF! :smile:

What have you tried? what equations do you know that might help? :smile:
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top