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Why the torque is maximum when the plane is horizontal and falls to zero when it is vertical?
Torque is maximized when the plane is horizontal because the force due to gravity acts perpendicularly to the lever arm, resulting in the greatest rotational effect. As the plane tilts towards a vertical position, the angle between the force of gravity and the lever arm decreases, leading to a reduction in torque. When the plane is completely vertical, the force of gravity acts parallel to the lever arm, causing the torque to drop to zero. Thus, the orientation directly influences the effectiveness of the force in creating rotational motion.
Exactly vertical or perpendicular?
There is no such thing as exactly vertical because either it is vertical or it is not. You cannot have approximately vertical - it is not vertical, then. Vertical means at 90 degrees to the horizon (or horizontal).
How do you find the normal force of a 25 kg object being pulled by a rope at a tension of 120 N along a frictionless surface at an angle of 30 degrees?
I could be totally wrong but I believe you must take into account the forces on the object in the vertical direction. In this case, the object is being pulled by a rope with a tension of 120 N. The vertical force would therefore be 120 sin(30) Normally W = [F normal] with no vertical force. However, since there is a vertical force: W = [F normal] + [120 sin (30)] (25 kg X 9.8 m/s2) = [F normal] + [120 sin (30)] 245 N - 60 N = [F normal] 185 N = [F normal] I apologize if this is incorrect as I haven't been in a physics class in over 4 years. Good luck!
How do you get your vertical?
by moving vertical
What effort is required to lift a 300 kg weight?
On earth, any vertical force greater than 661.39 pounds will lift a mass of 300 kg.
