Average acceleration and instantaneous acceleration.
Question: a particle moves according to
x = - t2 + 2 t
y = 0.5 t2 - 2.5 t +2.
Find its acceleration at t = 2 s in unit-vector notation and as a magnitude and an angle.
Question: If the position of a particle is given by
with in meters and t in seconds. What must be the units of the coefficients 3, 5 and -2?