Question

An acorn falls from a tree. How fast is the acorn moving after 1.2 seconds?

Answer 1

does it say to use meters per second for speed units, or ft/sec

Answer 2

v = 9.8*t in m/s
v = 32 * t in ft/s

Answer 3

@AJ01 the initial velocity is zero ,
y = vo*t - 1/2 *at^2 , vo is initial velocity

Answer 4

The general equation is
y =-1/2 * a t^2 + vo*t + yo

vo = initial velocity (here zero)
yo = initial height (of the tree)

y =- 1/2 * at^2 + 0*t + yo ,
y = -1/2 * at^2 + yo

Answer 5

Yes its m/s.

Answer 6

v= dy/dt = -1/2 *2* a * t = -a*t

Answer 7

yes... you are right

Answer 8

@janello do you see how to solve it? plug in 1.2 for t in
v = 9.8 * t

Answer 9

So 11.8? @Perl