The rocket sled shown in the figure decelerates at a rate of $165\frac{m}{s^2}.$ Its passenger has a mass of $72$ kg $.$ Use a coordinate system in which the sled is moving in the positive direction, and assume the contact forces with the seat are the only forces acting on the passenger.

Randomized Variables

$a=165\frac{m}{s^2}$

$m=72kg$

Part $($a$)$

Calculate the horizontal component of the force that the seat exerts against his body, in newtons.

$F_h=$

$$

What is the ratio of the magnitude of the horizontal force to the magnitude of the force of gravity?

Part $($c$)$

Find the angle of the total force that the seat exerts against his body. Give your answer in degrees from the negative horizontal direction, with positive being clockwise.