pts$.)$ A rigid body in static equilibrium experiences

a$.$ Only small forces

b$.$ Only large forces

c$.$ No unbalanced forces

d$.$ No balanced forces

$(2$ pts$.)$ All of the following attributes characterize a force except:

a$.$ Magnitude

b$.$ Center of rotation

c$.$ Direction

d$.$ Line of action

$(2$ pts$.)$ A couple is a pair of equal forces working in opposite directions. True or False

$(2$ pts$.)$ Kilograms is a measure of force. True or False

$(2$ pts$.)$ Convert $12$ m into inches.

$(3$ pts$.)$ Convert $400ft-lbs$ into $N-m.$

$(3$ pts$.)$ Convert $120m\frac{i}{h}(mph)$ into $k\frac{m}{h}.$

Show all work for each problem.