A rock falls from rest, a vertical distance of 0.75 meters to the surface of a planet. If it hit the floor at a speed of 5 m/s,
a) what is the acceleration due to gravity here? SHOW ALL WORK.
b) how long would it have taken to fall on Earth? SHOW ALL WORK.
Is a) about 16.67 m/s^2?

Question

A rock falls from rest, a vertical distance of 0.75 meters to the surface of a planet. If it hit the floor at a speed of 5 m/s, 
a) what is the acceleration due to gravity here? SHOW ALL WORK.
b) how long would it have taken to fall on Earth? SHOW ALL WORK. 
>> Is a) about 16.67 m/s^2?

anonymous · Answer

This is my last homework problem for physics that I need help with. :/

anonymous · Answer

$$V _{final}^{2} = V _{initial}^{2} +2*a*\Delta y$$ you can use this. Actually you got the right answer.

For b, 
$$\Delta y =\frac{ 1 }{ 2 }g*t ^{2}$$  

you can use this.

anonymous · Answer

thank you!

anonymous · Answer

you are welcome !