Question

A 2.15 kg book is dropped from a height of
1.8 m.
a) What is its acceleration?
Answer in units of m/s2.

Answer 1

anything falling has the acceleration due to gravity, 9.8m/s^2

Answer 2

i tried that i don't know why its not right

Answer 3

i put -9.8m/s^2
it worked:)