The $750-1b$ load is being hoisted at a constant speed using the motor $M,$ which has a weight of $90lb.$ The beam has a weight of $50l\frac{b}{f}t$ and is fixed to the wall at A$.($Figure $1)$

Part A

Determine the magnitude of the resultant internal normal force acting on the cross section through point $B$ in the beam.

Express your answer in kilopounds to three significant figures.

$N_B=$

kip

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Part B

Determine the magnitude of the resultant internal shear force acting on the cross section through point $B$ in the beam.

Express your answer in kilopounds to three significant figures.

Figure

$1$ of $1$

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Part C

Determine the magnitude of the resultant internal bending moment acting on the cross section through point $B$ in the beam.

Express your answer in kilopound$-$feet to three significant figures.

$M_B=$

kip$*ft$