Rugby Player Problem: Solve for Time to Tackle

  • Thread starter Thread starter badsniper
  • Start date Start date
AI Thread Summary
Two rugby players are 37 meters apart, with one accelerating from rest at 0.5 m/s² and the other moving at a constant speed of 3.1 m/s. The problem requires determining the time until they tackle each other. To solve it, one must write equations for the distance covered by each player as a function of time and then calculate the separation distance. There is confusion regarding the use of "function of time," with some preferring linear kinematics equations instead. The discussion highlights the need for clearer explanations of the mathematical approach to solve the problem.
badsniper
Messages
3
Reaction score
0

Homework Statement


two rugby players are running toward each other. They are 37 m apart. if one accelerates from rest at 0.5m/s2 and the other was already moving at 3.1 m/s and maintains his speed,

a) How long before they tackle each other?


This question is annoying me so much right now, I found 2 archived solutions to the problem, but they don't explain in enough detail, so I'm just re-posting it so that I may know how to solve it.
 
Physics news on Phys.org
badsniper said:

Homework Statement


two rugby players are running toward each other. They are 37 m apart. if one accelerates from rest at 0.5m/s2 and the other was already moving at 3.1 m/s and maintains his speed,

a) How long before they tackle each other?This question is annoying me so much right now, I found 2 archived solutions to the problem, but they don't explain in enough detail, so I'm just re-posting it so that I may know how to solve it.
Write out the equation for distance covered by each runner as a function of time. Then write out the equation for separation as a function of those distances ie: s = 37 - (d1(t) + d2(t)). What is the value of s when they collide? Work out t from that.

AM
 
Andrew Mason said:
Write out the equation for distance covered by each runner as a function of time. Then write out the equation for separation as a function of those distances ie: s = 37 - (d1(t) + d2(t)). What is the value of s when they collide? Work out t from that.

AM

Sorry, but I don't understand what you mean by "Function of time", or function of distances, I was attempting to solve it using the linear kinematics equations.
 
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