Lab 4 | Physics homework help

2. Instruction on data analysis

(a) Calculate 1 2&F F for measurement #1, calculate 1 2 3, ,F F F for measurements #2 & #3. Record all the calculated force values under the caption of each corresponding Table.

(b) Note: the relation between the resultant force R and equilibrant force E is:

.R E and R R E E= − = = = (c) Use graphical (parallelogram) method to determine the resultant force R

• Draw a vector sum diagram (with ruler, protractor, compass) to scale on a graph sheet.

(Note: graphic sheets are provided at the end of Exp 4 lab manual).

• Measure the magnitude R and the orientation angle R

of the resultant force R .

• An example is given in Exp 4 video in which we use a scale of 2 cm for 1N on the

graphic sheet.

• Record the magnitudes ( & )R E and orientation angles ( & ) R E in the row

“Graphic result” of each Table. (d) Use analytical method to determine the resultant force R .

• Using component method (Fig. 3) compute the magnitude R and the orientation

angle R of the resultant force R .

• Record the magnitudes ( & )R E and orientation angles ( & ) R E in the row

“Analytical result” of each Table.