Physics

A hockey player hits a puck with his stick, giving the puck an initial speed of 5.8m/s .

Part A
If the puck slows uniformly and comes to rest in a distance of 20m , what is the coefficient of kinetic friction between the ice and the puck?

  1. 👍 0
  2. 👎 0
  3. 👁 105
asked by Joe
  1. mv²/2 =W(fr) = μNs= μmgs
    μ=v²/2gs =5.8²/2•9.8•20 =0.086

    1. 👍 0
    2. 👎 0
    posted by Elena
  2. x = (v-u)(v+u)/2a
    where x = distance, v = final speed, u = initial speed, a = acceleration

    a = (v-u)(v+u)/2x = -5.8*5.8/40 = -0.841

    f=ma
    u(k) * f(normal) = ma
    u(k) *m *g = ma
    u(k) *g = a
    u(k) = a/g
    u(k) = -0.841 / 9.81 = 0.086
    where u(k) = coefficient of kinetic friction

    1. 👍 0
    2. 👎 0
    posted by Dan

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A hockey player hits a puck with his stick, giving the puck an initial speed of 5.0 m/s. If the puck slows uniformly and comes to rest in a distance of 20 m, what is the coefficient of kinetic friction between the ice and the

    asked by anonymous on January 21, 2009
  2. physic

    A hockey player strikes a puck that is initially at rest. The force exerted by the stick on the puck is 950 N, and the stick is in contact with the puck for 4.4 ms (0.0044 s). (a) Find the impulse imparted by the stick to the

    asked by glenmore on December 4, 2011
  3. physical science explorations

    A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. how 1. much did the hockey puck accelerat? 2. how much force was exerted on the puck? 3. how much force did the puck exert on the

    asked by Peter S. on August 25, 2009
  4. Physical science

    A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey

    asked by Aj on March 14, 2011
  5. Physical Science

    A player uses a hockey stick to increase the speed of a 0.200kg hockey puck by 6 m.s in 2 seconds. A) How much did the hockey puck accelerate? B) How much force was exerted on the puck? C) How much force did the puck exert on the

    asked by Sweet on February 7, 2011
  6. physical science explorations

    A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. how 1. much did the hockey puck accelerat? 2. how much force was exerted on the puck?

    asked by Peter S. on August 25, 2009
  7. physical sciece

    aA player uses a hockeey stick to incease the speed of a 0.200 kg hockey puck by 6 m /s in 2 seconds. (A)How much dd the hockey puck accelerate? (B)How much force was exerted on the pack? (C)How much force did the puck exert on

    asked by shantae on March 17, 2011
  8. physical science

    a player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. how much force was exerted on the puck? how much force did the puck exert on the hockey stick?

    asked by lisa on February 6, 2008
  9. physics

    A 98.0 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 49.5 m/s. If both are initially at rest and if the ice is frictionless, how far does the player recoil in the time it takes the puck to reach the goal

    asked by alex on February 3, 2015
  10. physics

    A 96.5 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 45.5 m/s. If both are initially at rest and if the ice is friction less, how far does the player recoil in the time it takes the puck to reach the

    asked by mathew on September 29, 2014

More Similar Questions