Find Coefficient of Friction: Grindstone Problem

  • Thread starter Thread starter Arielf04
  • Start date Start date
AI Thread Summary
To find the coefficient of friction in the grindstone problem, one must apply principles of rotational dynamics and kinematics. The grindstone, a solid disk, has a defined mass and diameter, and it decelerates to rest under a normal force applied by the ax. The kinetic energy equation, K = 1/2 M(Vcm)^2 + 1/2 (Icm) W^2, is relevant, particularly since the center of mass is stationary. The focus should be on relating the torque caused by friction to the angular deceleration of the grindstone. Understanding these dynamics will lead to calculating the coefficient of friction effectively.
Arielf04
Messages
2
Reaction score
0
Please give me a hint on what should I follow in order to solve the problem I am stuck and have no clue :confused:

A grindstone in the shape of a solid disk with diameter 0.530 and a mass of = 50.0 is rotating at = 830 . You press an ax against the rim with a normal force of = 260 , and the grindstone comes to rest in 7.80 .

Find Coefficient of friction between the axe and the grinding stone.
 
Physics news on Phys.org
Do you know any rotational dynamics, specifically kinematic equations of such?
 
Well this is what I know

K= 1/2 M(Vcm)^2 + 1/2 (Icm) W^2

Since the center of mass is not moving then?

K=1/2 (Icm) W^2?
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Rotational Dynamics of a Grindstone
Replies
6
Views
2K
Torque and angular acceleration of a grindstone
Replies
7
Views
3K
Grindstone and kinetic friction problem
Replies
6
Views
5K
Calculating Tangential Force for Grindstone Rotation
Replies
27
Views
6K
How Do You Calculate the Force Needed to Accelerate a Grindstone?
Replies
21
Views
8K
Torque/ find the coefficient of friction
Replies
9
Views
9K
How Does Friction Affect the Stopping Time of a Rotating Grindstone?
Replies
13
Views
5K
Torque and angular accelerationfinding coeff. of friction
Replies
3
Views
3K
Torque and Forces of grindstone
Replies
1
Views
4K
Coefficient of Friction Between Axe and Grindstone (Torque & MI)
Replies
4
Views
11K

Hot Threads

Recent Insights

Back
Top