Texts: An object undergoes acceleration πβ = 2.3π€Μ + 3.6π₯Μ m/sΒ² for 10 s. At the end of this time, its velocity is π£ββ = 33π€Μ + 15π₯Μ m/s. (a) What was the velocity vector, π£ββ, at the beginning of the 10-second interval? (b) By how much did its speed change? (Compare initial speed with final speed) (c) By what angle did its direction change? (d) Show that the speed change is not given by the magnitude of the acceleration multiplied by the time. (|π£ββ| β |π£ββ| β |πβ| β π‘) In what circumstance would this equality hold?