Question

Please help. I really want to understand how to do these problems

PHY 1951 ONLY*** 5. Three masses, 258. Sog and 75g, hang over a force table at angles 0°, 90 and 180 respectively. a) Find the magnitude and the angle of the resultant force, graphically Do this on graph paper! SOLUTIONS ON NEXT PAGEIT! b) Find the magnitude and the angle of the resultant force, analytically. c) Calculate the error between the two methods using the analytical as the theoretical value.

Answer 1

Solution - For graphical method take 2 cm = 25 - Force = 250g Representing the forces. Let us grams so K------ Resultant 175g o 259 A AS 26 a . NOW S 25 g and 75g are opposite to each other so Net Force of these two vector's would be so g Lefl. sog and 50g there are two vectors they are joined tail to tail so draw a parallelogram By joining them the diagonal of the parallelogram is their Resoltant. Length of diagonal = 5-6 cm So magnitude = 5.6 x 25 3 a 7000 g Resoltant of Now Resutant Now from Analytically method Aand C is 50g Left of 50g and 50g R= √ A²+B² ZABLOS

Rs 50%+ 502+ 2 50x50 LOS 90 g = 5052 g = 10.7g true value of difference - 70-7 - 70 x 100 4. 70-7 E ooggy. ] you should use graph paper for First part You can also take scale as lcm= 259