Calculating Heights and Acceleration: A Physics Question

  • Thread starter Thread starter Matthew
  • Start date Start date
  • Tags Tags
    Couple Physics
AI Thread Summary
To solve the first question about the flowerpot's height, the pot is observed for a total of 1.0 second while moving up and down a window that is 1.77m high. The time taken to reach the maximum height can be calculated as half of the total time, which is 0.5 seconds. Using the kinematic equations for free fall, the maximum height above the window can be determined. The second question regarding the runner's acceleration has been resolved, indicating that the focus is now solely on the first question. The discussion emphasizes the application of physics principles to calculate height and acceleration.
Matthew
Messages
7
Reaction score
0
Hey can someone help me out with one or both of these questions?

1. A dog sees a flowerpot sail up and then back down a window (height of window is 1.77m). If the total time the pot is in sight for 1.0 s, find the height above the top of the window to which the pot rises.


2. A runner hopes to complete a 10-km run in 30.0 min. After exactly 27.0 min there is still 1100 m to go. The runner must then accelerate at 0.20 m/s^2 for how many seconds in order to exactly achieve his desired time?

Thanks in advance.
 
Physics news on Phys.org
n/m I got the answer to number 2. All I need now is question 1.
 
See my post to your question which appears in the "homework help zone."
 
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