Calculating average force - momentum problem

AI Thread Summary
To calculate the average force exerted on a golf ball by a club, the problem involves the ball's mass of 45 grams, its initial speed of 55 m/s at a 28° angle, and contact time of 15 ms. The relevant equations include momentum conservation and average force calculations, but confusion arises regarding the necessity of the golf club's mass. Assuming the club has infinite mass simplifies the problem, leading to the conclusion that the ball could leave the club at 110 m/s in an elastic collision. However, without additional information on the club's impact characteristics, the problem remains unsolved. The discussion highlights the need for clarity on assumptions in momentum problems.
AgentRedfield
Messages
10
Reaction score
0

Homework Statement


A golf ball is struck by a golf club at 55 m/s at an angle of 28.0° above the horizontal. The mass of the ball is 45 grams and is in contact with the golf club for 15 ms. Calculate the average force exerted on the ball by the club.

Homework Equations


pi + FΔt = pf
p = mΔv
a = Δv/t

The Attempt at a Solution


I'm really confused because it doesn't seem like I have enough information to solve the problem. Don't I need to know the mass of the golf club?
 
Last edited:
Physics news on Phys.org
I would assume two things, the golf club has infinite mass and the collision is elastic, so the golf ball will leave the club at 110 m/s (do you agree?). Otherwise you are right, there is not enough information.
 
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