Posted by **Anonymous** on Wednesday, September 29, 2010 at 2:07pm.

A hockey puck struck by a hockey stick is given an initial speed v0 in the positive x-direction. The coefficient of kinetic friction between the ice and the puck is μk.

(a) Obtain an expression for the acceleration of the puck. (Use the following as necessary: μk and g.)

a =

(b) Use the result of part (a) to obtain an expression for the distance d the puck slides. The answer should be in terms of the variables v0, μk, and g only.

d =

- Physics -
**Dan**, Sunday, January 10, 2016 at 12:08am
f = ma

μk * f(normal) = m*a

μk *m*g = m*a

μk *g =a

so a = μk*g

this is defined to be a negative acceleration since the friction force works in the opposite direction to the movement of the puck

vFinal = v0 + at

so t = (vF-v0)/a

d = t*(vF+v0)/2

so d = (vF+v0)(vF-v0)/2a

substitute in our 'known' values: a = μk*g, and vF = 0 (since the puck has stopped sliding)

d = (0+v0)(0-v0)/ 2(μk*g)

d = v0^2 / (2μk*g)

(eliminate negatives as d is positive)

## Answer This Question

## Related Questions

- physics - A hockey puck struck by a hockey stick is given an initial speed v0 in...
- Physics - A hockey player hits a puck with his stick, giving the puck an initial...
- Physics - A hockey player hits a puck with his stick, giving the puck an initial...
- physics - A hockey puck on a frozen pond is given an initial speed of 20.0 m/s. ...
- physics - a hockey puck is given the initial speed of 10 m/s. If the coefficient...
- Physics - While sliding horizontal on a frictionless surface at a speed of 30 m/...
- physics - A hockey puck of mass 0.27 kg is sliding along a slippery frozen lake...
- physics - A hockey puck slides with an initial speed of 52.3 m/s on a large ...
- physics - A hockey puck slides with an initial speed of 40.7 m/s on a large ...
- Physics - A hockey puck slides with an initial speed of 48 m/s on a large frozen...

More Related Questions