Question

An object falls freely from rest on a planet where the acceleration due to gravity is 27 m/s^2. After 5.6 s, what will be its speed? Answer in units of m/s.

Answer 1

have you tried using the kinematic equation vfinal = vinitial + acceleration (change in time)?

Answer 2

or in this case since it falls it would be + (- acceleration)(change in time)

Answer 3

So, would it be (-27)(5.6) or (27)(5.6)? It comes out to be (-) 151.2 m/s.

Answer 4

its depends on the way you look at it, however i would assume that the acceleration of gravity here would be negative since it states that its falling

Answer 5

Thank you! The answer turned out to be 151.2 m/s, no negative.

Answer 6

ah i see well my bad about that lol

Answer 7

and no problem