Golf Ball Physics Probem

  • Thread starter FahimP
  • Start date
  • #1
14
0

Homework Statement



The greenskeepers of golf courses use a stimpmeter to determine how "fast" their greens are. A stimpmeter is a straight aluminum bar with a V-shaped groove on which a golf ball can roll. It is designed to release the golf ball once the angle of the bar with the ground reaches a value of θ = 20.0°. The golf ball (mass = 1.62 oz = 0.0459 kg) rolls 29.3 in down the bar and then continues to roll along the green for several feet. This distance is called the "reading." The test is done on a level part of the green, and stimpmeter readings between 7 and 12 ft are considered acceptable. For a stimpmeter reading of 11.4 ft, what is the coefficient of friction between the ball and the green? (The ball is rolling and not sliding, as we usually assume when considering friction, but this does not change the result in this case.)

diagram in this link :
http://s172.photobucket.com/albums/w30/afghanplayr/?action=view&current=golf.gif

Homework Equations





The Attempt at a Solution


E = K + U + W(work vs. friction )

E = KE + KEi + PE + PEi + uKmgsine(theta)d
since it is at rest initial kinetic and potential are zero

E = 1/2(mv^2) + mgh + uKmgsine(theta)d

KEf = 1/2(0.0459kg)(3.65m/s)^2 = 0.3057 J
PEf = (0.0459)(9.81)(4.2187m) = 1.899 J

Wf= uK(0.0459)(9.81)(sin20)(3.475m)

uK= 1.54

well this is where i realized i was wrong ANY HELPPPPPPPPP I AM REALLY STUCK

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

Related Threads on Golf Ball Physics Probem

  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
19
Views
5K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
11
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
2
Views
7K
Top