F_A and F_B are two forces with equal magnitude and opposite directions, applied
ID: 1718108 • Letter: F
Question
F_A and F_B are two forces with equal magnitude and opposite directions, applied on points A and B respectively. Which of the statements below is not true? The net force of this system is zero. The net moment cannot be zero, no matter what directions the forces are acting on. The moment of the force couple is (rAB Times F_B ). The moment of the force couple is (rBA Times F_A ) Which of the following can be a result of the formula u*(r Times F)? [3i + 4j-5k]Nm 45 degree Imagine 15 people try to turnover a bus by pushing it simultaneously from where they stand. 3 people are at the front of the bus applying moments of couples by their two hands; 2 people are at the tail; and the rest are pushing on the right side. What would be the simplest form (mathematically) to represent this system of 15 forces? We can reduce it to 1 force and 1 moment. We can reduce it to 3 resultant forces and no further. We can reduce it to 3 resultant forces and 1 moment and no further. It depends on how they distribute around the bus.Explanation / Answer
1. the moment of force couple is rAB x FB
the moment of force couple is rBA x FA
3. It depends on how they distribute around the bus.
as the centre of gravity of bus will play the main role. distance from the C.G. will create turnover.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.