Friction

[Drey0287]

Assume the weight of a pool ball is .17kg. If the ball traveled 1.2 m in 5.3 seconds, what is the force of Friction and coefficient of friction between the pool ball and the table?

Now, All I know how to do it calculate the normal force which is (9.8)(.17) = .1666 but where do i get from here???

[dextercioby]

Assume the weight of a pool ball is .17kg. If the ball traveled 1.2 m in 5.3 seconds, what is the force of Friction and coefficient of friction between the pool ball and the table?

Now, All I know how to do it calculate the normal force which is (9.8)(.17) = .1666 but where do i get from here???

Hints:Use Newton's second law for the rotational motion.(torque is the sum of momenta of all forces).From there u should find µ.The normal force u calculated should be ten times bigger.
I=\frac{3mr^{2}}{5}

Daniel.

[soccerjayl]

I find the acceleration to be 0.04272 m/s^2

Therefore, can you not find the force of friction through F=ma?

F(subF)=(.17kg)(0.04272 m/s^2)

mew=F(subF)/F(subN)

mew=0.007262/0.1666

mew=0.0436

check my work, i may be wrong

[dextercioby]

I find the acceleration to be 0.04272 m/s^2

Therefore, can you not find the force of friction through F=ma?

F(subF)=(.17kg)(0.04272 m/s^2)

mew=F(subF)/F(subN)

mew=0.007262/0.1666

mew=0.0436

check my work, i may be wrong

My µ approximately equal to 0,003.

Show your reasoning to depict you mistakes.

Daniel.