00:01
For this question, the first part says, what is g? so you have a velocity versus time graph.
00:08
When you have a velocity versus time graph, the slope is equal to acceleration.
00:13
So for slope, it's rise over run.
00:16
Y2 minus y1 over x2 minus x1.
00:20
So i just chose two points on the graph that were easy to read, and i changed them into the correct unit.
00:26
So it was centimeters.
00:28
We want to put it in a meter.
00:29
So instead of 90 centimeters, that's 0 .9 meters minus 0 .3 meters per second.
00:36
So it's centimeters per second.
00:37
Now it's meters per second.
00:39
And your time needs to be in seconds, not milliseconds.
00:42
So you have to move your decimal three places to the left.
00:44
So 0 .120 seconds minus 0 .040 seconds.
00:49
When you do that, the slope is negative 2 .87 meters per second squared.
00:55
That's your acceleration due to gravity on that planet.
00:57
The next question said, how long was the picket fence? so looking at the information, i'm assuming on that planet is what the question was asking...