# physics

posted by .

Hockey Puck A 110 g hockey puck sent sliding over ice is stopped in 13 m by the frictional force on it from the ice.
(a) If its initial speed is 5.0 m/s, what is the magnitude of the frictional force?
1 N
(b) What is the coefficient of friction between the puck and the ice?
2

• physics -

Vf^1=Vi^2 + 2ad but a= force/mass, so

you can solve for force.

coefficent offriction:
frictionforce=mu*mg solve for mu.

• physics -

you have to give formulas not answers

• Physics -

v = u + a*t
so t = (v-u)/a
x = t (v+u)/2
substituting for t, x = (v+u)(v-u)/2a
put in known values:
13 = (5)(-5)/2a
a = -25/26 m/s^2

f = m*a
u(k) * f(normal) = m*a
u(k) *m*g = m*a
u(k) = a/g
u(k) = -25/26 /9.81 = 0.098
where u(k) = coefficient of friction

for magnitude of friction force:
u(k)*m*g = 0.098 * 0.110kg * 9.81 m/s^2 = 0.106N

## Similar Questions

1. ### physics

A 110g hockey puck sent sliding over ice is stopped by a frictional force on it from the ice a) if its intial speed is 6.0m/s, what is the magnitude of the frictional force?
2. ### physics

An ice hockey puck slides along the ice at 12m/s. A hockey stick delivers an impulse of 4.0kg*m/s causing the puck to move off in the opposite direction with the same speed. What is mass of puck?
3. ### physics homework

a hockey puck of mass 0.05kg sliding on the ice with velocity 20m/s is stopped by a goalie in 0.10sec. what is the magnitude and direction of the force exerted by the goalie on the puck.
4. ### physics

A hockey puck of mass 0.450 kg is sliding across the ice. However, because of the frictional force between the puck and the ice, the motion of the puck is stopped in 15.8 seconds. Determine the magnitude of the frictional force.
5. ### physics

An ice hockey puck slides along the ice at 12 m/s. A hockey stick delivers an impulse of 4.0 kg*m/s causing the puck to move off in the opposite direction with the same speed. What is the mass of the puck?
6. ### Physics

A 110 g hockey puck sent sliding over ice is stopped in 14.9 m by the frictional force on it from the ice. (a) If its initial speed is 7.8 m/s, what is the magnitude of the frictional force?
7. ### Physics

A hockey puck slides along the ice. There is a frictional force between the ice and puck, and this is the only horizontal force on the puck. Which of the following must be true?
8. ### physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding …
9. ### physics

An ice hockey puck slides along the ice at 15 m/s . A hockey stick delivers an impulse of 4.8kg/m/s causing the puck to move off in the opposite direction with the same speed. what is the mass of the puck?
10. ### college physics

A hockey puck of mass 0.228 kg si sliding across level ice. There is a force of friction of 0.057 N acting opposite the direction of motion of the puck while it is sliding. a) what is the acceleration of the puck while it is sliding?

More Similar Questions