工程科學應力應變題 Ex1~Ex2 ?
Acceleration due to gravity = 10 ms-2;
Calculation steps should be clearly shown;
Answers correct to two decimal places.
1. Determine the resultant and its position of the system of forces 200N15度角, 150N100度角, 120N-120度角 and 300N-50度角.
2. ABCD is a light inextensible string passing round a smooth pulley C and a force F (N) applied at B in a direction perpendicular to the string maintains equilibrium. Determine the magnitude of F and the angle BCD.
- violinistLv 51 decade agoFavorite Answer
1) resolve the forces into x, y direction
200sin15 + 300sin50 + 150cos10 + 120cos30
200cos15 + 300cos50 - 150sin10 - 120sin30
there seems to be no any weight, how comes a force is needed to balance?Source(s): myself