An object slides down a inclined surface in the presence of kinetic friction forces.
At the given inclination the kinetic friction force is found to be of magnitude 90 N.
Now, the angle that the surface makes with respect to the horizontal is increased and the object continues to slide down the surface.
WHAT will the magnitude of the new kinetic friction force present be?
Why are you avoiding analyzing friction force vs angle?
I haven't gotten to the chapter on friction yet, so I am totally clueless...I am still on kinematics and biomechanics right now.
So I am guessing kinetic friction forces is the same as friction problem before, so the answer would be greater than zero and less than 90 N?
yes.
To determine the magnitude of the new kinetic friction force on the object as the angle of inclination increases, we need to understand the factors that affect kinetic friction.
Kinetic friction force depends on the normal force and the coefficient of kinetic friction. In this case, as the angle of inclination increases, the normal force acting on the object will also change.
When an object is on an inclined surface, the normal force is not equal to the weight (mg) but rather the component of the weight perpendicular to the inclined plane.
To calculate the normal force, we can use the following equation:
Normal force = weight * cos(theta)
Where:
- weight (mg) is the force of gravity acting on the object
- theta is the angle of inclination
Once we find the new normal force, we can calculate the new kinetic friction force using the equation:
Kinetic friction force = coefficient of kinetic friction * normal force
Where:
- coefficient of kinetic friction represents the roughness between the object and the inclined surface
By plugging in the values, we can determine the magnitude of the new kinetic friction force. Note that the coefficient of kinetic friction remains the same throughout this situation.