# Hockey pucks - V t 1/2at 2 o ΔX = 0 ½(4m/s 2(5.5 s 2 ΔX...

This preview shows pages 1–2. Sign up to view the full content.

28). A hockey puck (mass = 1.5 kg) leaves the players stick (moving to the left) with a speed of 22 m/s and slides on the ice before coming to rest. The coefficient of friction between the puck and the ice is 0.4. What is the normal force on the puck? o F W1E = m*g o F W1E = 1.5kg * 10 m/s 2 15 N What is the friction force exerted on the puck due to the ice? o F W1E * μ = F μ due to ice o 15 N * 0.4 6 N What is the magnitude of the acceleration of the puck due to this friction force? o F= m*a o 6 N = 1.5 kg * a a= 4 m/s 2 How long will the puck slide after leaving the players stick? (what amount of time will it be sliding) o V = V 0 + a*t o 22 m/s = 0 + (4 m/s 2 ) * t t= 5.5 s How far will the puck slide after leaving the players stick? o ΔX =

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: V t + 1/2at 2 o ΔX = 0 + ½ (4m/s 2 )(5.5 s) 2 ΔX = 60.5 m A hockey puck (mass = 3.5 kg) leaves the players stick with a speed of 35 m/s and slides on the ice for 90 meters before coming to rest. What is the magnitude of the acceleration on the puck? o V 2 = V 2 + 2*a*ΔX 35 2 = 0 + 2*a* 9m o 6.8056 m/s 2 What is the friction force exerted on the puck due to the ice? o f 1S = ma 3.5 kg * 6.8056 m/s 2 o 23.8194 N What is the normal force on the puck? o F N1S = m*g 3.5 kg * 10 m/s 2 o 35 N What is the friction coeFcient between the puck and the ice? o Force exerted due to ice / normal force 23.8194 N/ 35 N o µ = 0.6806 (unitless)...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern