In the animation shown, a space probe has engines that can fire on all four sides. Two of the engines engage at t = 4.0 s. Graphs of the x-component of acceleration and y-component of acceleration as functions of time are shown.


a) During the interval from t = 4.0 s to t = 8.0 s, is the x-acceleration of the probe positive, negative, or zero?

zero
negative
positive


b) During the interval from t = 4.0 s to t = 8.0 s, is the y-acceleration of the probe positive, negative, or zero?
zero
positive
negative


c) During the interval from t=4.0 s to t=8.0 s, is the magnitude of the x-acceleration of the probe constant, increasing, or decreasing?
decreasing
increasing
constant


d) During the interval from t = 4.0 s to t = 8.0 s, is the magnitude of the y-acceleration of the probe constant, increasing, or decreasing?
decreasing
constant
increasing


e) What is the change in vx from t = 4.0 s to t = 8.0 s?
Δvx = m/s

f) What is the change in vy from t = 4.0 s to t = 8.0 s?
Δvy = m/s