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.

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.