7. An object moves along a plane such that the x- and y-coordinates of its velocity are defined by the functions vx (t) = 3t^2 - 3 and vy (t) = 2t^2 - 8. At what
time is the object's velocity purely horizontal?

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

D) the event horizon, a large planet and the chute located between the two.

Answerincreasing preload