Find the resultant of two forces, one of 72 pounds and the other of 56 pounds, if they act at a point at an angle of 37 degrees.
show work please!
choices :
43 lb.
108 lb.
121 lb.

The resultant of two forces is 43 lb.

Step-by-step explanation:

First force ()= 72 pound

Second force ()= 56 pound

Angle between two force (α) = 37°

Now using the relation as:

  Resultant force (R²) = ² + ² - 2× × × Cosα

                         or, R² = 72² + 56² - 2× 72× 56× Cos(37)

                         or, R²= 8320 - 8064× 0.798

                         or, R=

                          ∴ R= 43 lb

Hence the resultant of two forces is 43lb.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.