- #1
jhrnndz1
- 18
- 0
Alright, I have another question that I want to make sure I did correct. The question is "an objec of mass m is at rest on a rough inclined plane with height h, length 8 m, and which makes an angle of 30degrees with the horizontal. The object is allowed to move and it stops on a rough horizontal surface, at a distance of 4m from the botton of the inclined plane as shown. The coefficient of kinetic friction on the inclined plane is 0.4 and g=10m/s^2.
What is the speed of the object ast the bottom of the inclined plane?
Alright i used the equation KEfinal -PEfinal = KEinitial -PEinitial, put in the numbers and calculated the velocity to be 12.65 m/s.
The second questin is...
What is the coefficient of kinetic friction for the horizontal surface?
I used the equation Normal force = Force of weight and got
mass*gravity*distance *coefficient of kinetic friction = mass*gravity*distance*coefficient of friction on the incline.
I canceled the mass and the gravity and put in the numbers,
(4m for distance on horizontal0*(uk)= distance of 4 m, (which i obtained from sin30=8/d)*cos30degrees*0.4(the planes coefficient of friction).
I then solved for the coefficient of fricton from the horizontal and calculated 0.35.
(Is this correct?
What is the speed of the object ast the bottom of the inclined plane?
Alright i used the equation KEfinal -PEfinal = KEinitial -PEinitial, put in the numbers and calculated the velocity to be 12.65 m/s.
The second questin is...
What is the coefficient of kinetic friction for the horizontal surface?
I used the equation Normal force = Force of weight and got
mass*gravity*distance *coefficient of kinetic friction = mass*gravity*distance*coefficient of friction on the incline.
I canceled the mass and the gravity and put in the numbers,
(4m for distance on horizontal0*(uk)= distance of 4 m, (which i obtained from sin30=8/d)*cos30degrees*0.4(the planes coefficient of friction).
I then solved for the coefficient of fricton from the horizontal and calculated 0.35.
(Is this correct?