Football Punter's Force: 0.55kg at 8m/s in .25s

  • Thread starter Thread starter DeBbIeFrIcKeNrAy
  • Start date Start date
AI Thread Summary
The discussion focuses on calculating the constant force exerted by a football punter on a 0.55 kg football, which accelerates from rest to 8.0 m/s in 0.25 seconds. The acceleration is determined to be 32 m/s² using the formula (final speed - initial speed) / time. By applying Newton's second law, F = ma, the force is calculated as 17.6 N. This indicates that the punter exerts a constant force of 17.6 N on the football. The calculations demonstrate the relationship between mass, acceleration, and force in sports physics.
DeBbIeFrIcKeNrAy
Messages
10
Reaction score
0
A football punter accelerates a 0.55 kg football from rest to a speed of 8.0m/s in .25s. What constant force does the punter exert on the ball?
 
Physics news on Phys.org


To find the constant force exerted by the punter on the football, we can use the formula F=ma, where F is force, m is mass, and a is acceleration. In this case, the mass of the football is 0.55kg and the acceleration is (8.0m/s - 0m/s)/0.25s = 32m/s^2. Plugging these values into the formula, we get F=(0.55kg)(32m/s^2) = 17.6N. Therefore, the punter exerts a constant force of 17.6N on the football.
 
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