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veronicak5678
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Homework Statement
On the surface of the moon, an astronaut jumps with a speed of 1.0 m/s at an angle of 30 degres above the horizon. A max height of .78 m is reached.
a- What is the acceleration of gravity on the moon?
b- Determine the horizontal range.
c- How much time did this displacement take?
Homework Equations
at/2 = v initial (sin angle)
displacement =((v initial) ^2 (sin angle))/a
ymax = (v initial)^2 / 2a
The Attempt at a Solution
question a-
2a(.78m) = 1)(1/2)
acceleration is .064 m/s^2
question b-
displacement = (1)(sin 60)/.064
displacement = 13.53 m
question c-
t = .5 m/s / .032 m/s^2
t = 15.62 s
Have I made a mistake? I thought gravity on the moon was 1.6 m/s^2, and my teacher usually uses examples that work out correctly.