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but that is all that is given. i found this here for practice problems http://www.real-world-physics-problems.com/friction-problems.html#hint_for_problem_4PeroK said:
can i solve this without torques? i haven't got into torques just yetwrobel said:
No. You have three unknowns, the two normal forces and the angle. So you need three equations. Only two are available from linear force balances in two dimensions, so your third must be from torque balance.Terrell said:
Friction is a force that opposes the motion of an object when it comes into contact with another object. It is caused by the microscopic roughness of surfaces and can act in the opposite direction of an object's motion.
Friction can make it more difficult for objects to move up an incline, as it acts against the object's motion. It can also help objects stay in place on an incline, preventing them from sliding down.
The amount of friction on an incline is affected by the type of surface the object is moving on, the weight of the object, and the angle of the incline. The rougher the surface, the heavier the object, and the steeper the incline, the more friction will be present.
Friction can be reduced on an incline by using a smoother surface, reducing the weight of the object, or decreasing the angle of the incline. Additionally, adding a lubricant between the object and the surface can also reduce friction.
No, friction cannot be completely eliminated on an incline. There will always be some level of roughness on surfaces, and some amount of contact between the object and the surface, resulting in friction. However, it can be minimized by using techniques such as lubrication or reducing weight and surface roughness.
