Consider the static equilibrium diagram here. what is the angle f1 must make with the horizontal? a. 35º b. 49º c. 52º d. 59º e. 70º

ANSWER

EXPLANATION

Since the body is in equilibrium, total upward forces must equal total downward force.

Also the net horizontal forces acting on the body must be zero.

We need to resolve into vertical and horizontal components.

The horizontal component is

.

The vertical component is

.

Equating the up force to the downward forces gives,

.

This implies that,

.

Also the horizontal forces must be equal.

.

Dividing equation (1) by equation (2) gives,

.

.

Therefore the given angle that must make with the horizontal is approximately 35° to the nearest degree.

a) are muscles that have bands.

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