Ok well "I have no clue" may have been a slight exaggeration but I'm not sure if my initial steps were in the right direction. What I did was:kuruman said:
Yes, that is problematic because the vertical wall is said to be "smooth" which means no friction. Yet the statement says that there is 40 N worth of friction between the ladder and the wall. Maybe it's a typo and the friction is between the ladder and the floor. @TheRealSJ please check the statement of the problem as was given to you.berkeman said:
Hmm I have checked the question again and it matches up with what I typed up here. Maybe my prof did a typo, I'll email him about it thankskuruman said:
If you lean a ladder against a wall and the floor is perfectly smooth it will always slip, so the friction must be from the floor.TheRealSJ said:Hmm I have checked the question again and it matches up with what I typed up here. Maybe my prof did a typo, I'll email him about it thanks
Good point. I missed that.haruspex said:
The principle of moment, also known as the law of moments, is a fundamental concept in physics and engineering that states that for an object to be in rotational equilibrium, the sum of the clockwise moments must be equal to the sum of the counterclockwise moments.
The principle of moment is used in various real-life situations, such as designing structures like bridges and buildings, calculating the weight distribution of objects on a seesaw, and determining the torque needed to loosen a bolt.
The mathematical equation for the principle of moment is M = F x d, where M is the moment, F is the force applied, and d is the distance from the pivot point to the line of action of the force. This equation shows that the moment is directly proportional to the force and the distance from the pivot point.
The principle of moment and the principle of torque are essentially the same concept, with the only difference being the units used. The principle of moment is typically used in statics and engineering, while the principle of torque is used in dynamics and rotational motion.
The principle of moment is a direct result of Newton's first law of motion, also known as the law of inertia. This law states that an object at rest will remain at rest unless acted upon by an external force. The principle of moment ensures that an object in rotational equilibrium will remain in that state unless acted upon by an external torque.