We've been talking about free fall in physics class. Consider the following questions:
- What are some examples of object that are in free fall (or at least "nearly" in free fall)?
- Can an object be in free fall and have a velocity of zero? Explain.
- Suppose the acceleration of gravity on Planet X is 20 m/s/s. How long would it take an object to fall to the ground from a height of 100 meters on Planet X? (Don't just give a numeric answer. Explain your reasoning.)
- The acceleration of gravity on the Moon is about 1/6 as much as Earth's. Suppose an astronaut throws a ball up vertically with an initial velocity of 20 m/s. How high above the Moon's surface will the ball rise? (Don't just give a numeric answer. Explain your reasoning.)
Select one of the above questions and leave your answer as a comment. You can also comment about what another student has said. Please don't continue to comment on a discussion that has been "solved".
4) The ball would rise to a height of about 122 meters before drifting back down to the moon's surface. This height is much higher than it would be on Earth due to a combination of the Moon's low gravity and its lack of an atmosphere. (There's no air on the Moon or anything that would really cause drag to slow down the golf ball's acceleration) In real life, Alan Shepard demonstrated this when he hit a golf ball while on the moon's surface.
ReplyDeleteG.W. (6th)
ReplyDeleteIm sorry for my first post ^^^ But 1) In the last week or so our class was told about how "rain" was in free fall or if it wasn't....Rain would be pelting youlike bullets. A Second Example would have to be when a skydiver jumps out of a plane horizontally for a few brief seconds he is in free fall. Untill he starts to fall.
Z.S 4th
ReplyDelete3) using the "little d" equation I found the answer to estimate to 3.16 seconds. I also tested the formula d(f)=d(I)+at and came up with the same estimated answer of 3.16
J.M 6th
ReplyDelete1)some examples of objects in free fall are any type of satellite or rocket in space without its rockets on or any other power source and another example would be the moon orbiting earth because of the earths gravitational pull.
Thanks for the comments this week!
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