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 vx and vy vs. time for the probe are shown.


a) At t = 7.5 s, is vx positive, negative, or zero?

positive
zero
negative


b) At t = 7.5 s, is vy positive, negative, or zero?
zero
negative
positive


c) During the interval from t = 6.0 s to t = 8.0 s, is the magnitude of vx increasing, decreasing, or constant?
constant
decreasing
increasing


d) During the interval from t = 6.0 s to t = 8.0 s, is the magnitude of vy increasing, decreasing, or constant?
constant
increasing
decreasing


e) What is the x-component of the displacement of the probe from t=0 to t = 4.0 s?
Δx = m
f) What is the y-component of the displacement of the probe from t=0 to t = 4.0 s?
Δy = m
g) What is the x-component of the acceleration of the probe at t = 2.5 s?
ax = m/s2
h) What is the y-component of the acceleration of the probe at t = 2.5 s?
ay = m/s2
i) What is the x-component of the acceleration of the probe at t = 7.5 s?
ax = m/s2
j) What is the y-component of the acceleration of the probe at t = 7.5 s?
ay = m/s2