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
2007-02-14 11:21:45 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Velocity up and down are equal, but opposite.
Since v up = 60 m/s, v down = -60 m/s
Since accel = change in velocity / time
a = (final velocity - inital velocity) / time
a = (-60 m/s - 60 m/s) / 3 s
a = -120 m/s / 3 s
a = -40 m/s2
2007-02-14 11:41:00 · answer #1 · answered by Thomas G 3 · 0⤊ 0⤋
Since velocity = acceleration * time and the time up = the time down, the acceleration from the highest point (where velocity is zero) to the ground (where v = 60 m/s) is given by 60 / 1.5 = 40 m/s^2.
2007-02-14 20:36:00 · answer #2 · answered by hznfrst 6 · 0⤊ 0⤋