grav acceleration?

Question

Space travelers from Earth have determined that on the Klingon planet 9-KMHF and object thrown upwards at the intial speed of 60 m/s returns to the surface after 3 sec. What is the gravitational acceleration on 9-kmhf??

please help thanks!1

Answer 1

The initial velocity of 60 m/s is reduced to 0 in 1.5 seconds
v = at
60 = a 1.5
a = 60 /1.5
a = 40 m/s/s
assuming it is "thrown" from ground level