Therefore as you move around the U. For comparison, the acceleration of gravity on the Moon is only 1. Why Union? Follow and Support Show your love for Bulldog Athletics ». Join in! Union's variety of organizations, events and sports offers something for everyone. Get Involved Find a place to get plugged in ». Theatre Production Join us Nov. Show Search Bar:. What is gravity and where is it the strongest in the United States? Student achieves only the first objective above or parts of the first two objectives 0 Student achieves none of the objectives above.
Student achieves none of the objectives above. But there is more to gravity than that! In this activity you will investigate a few properties of gravity and see how it affects you — not just on Earth, but on other planets! The goal of Part A is to determine the relationship between the acceleration due to gravity and the mass of an object.
The goals of Part B are to determine how much you would weigh on other planets and how that weight is affected by the mass and radius of the planet. Look over them: are they all the same size, the same weight? Pick two of the objects that have different weights and sizes.
They should be different enough that you can easily feel the difference. If they are dropped from the same height, will one hit the floor first, or will they hit at the same time? Make a prediction about this, and record it. Make sure the bottoms of the objects are the same height from the floor. Have another student kneel or lie down on the floor in front of you so they have a good view of where the objects will land. Did one hit first?
If so, which one? Note what happened on your worksheet. Repeat the procedure at least twice more to make sure you get consistent results. Why or why not? Can you think of any ways your experiment might have been thrown off?
Repeat the experiment, and again record your prediction and the results 5 Did the results surprise you? It applies to apples falling from trees, baseballs soaring into the outfield, and milk being spilled in your school cafeteria. The exact same model applies to other planets in our Solar System, too! Use the Solar System table given below to determine the value of g , the acceleration due to gravity, for each of the other planets in the Solar System. Use the equation for acceleration in the box and the values for the masses and radii of the planets listed in the table.
Complete the third column of the table with the value for the surface gravitational acceleration for each planet and the Moon. My predictions: 2. This is what I observed: 3. Accurate predictions? Observations of second experiment: 5.
Were you surprised? Points Part A: The Fall of Man Part B: Gravity of the Situation 4 A Student is able to predict the motion of objects falling to the ground B Student is able to make repeatable measurements of falling objects C Student is able to thoughtfully consider the initial predictions and revise them, if incorrect D Student is able to correctly conclude that mass has no effect on acceleration A Student is able to correctly calculate the accelerations for all the solar system bodies listed in the table B Student is able to correctly calculate all the ratios of the accelerations with respect to that of Earth C Student is able to thoughtfully consider the results of the calculations and provide correct answers about Mercury, Jupiter and the Moon D Student is able to correctly describe the difference between mass and weight 3 Student achieves the first three objectives above.
Venus 4. Earth 6. Mars 6. You may have noticed that the gravitational force equation is symmetric for our two objects — does this mean that the gravitational force that you exert on the Earth is as strong as that exerted on you by the Earth? This may seem puzzling at first, so let's take care to distinguish between force , F , and acceleration , a. Your gravitational acceleration is the rate at which your speed increases as you are drawn toward another object how quickly you become attracted to it.
Your gravitational force is the product of your acceleration and your mass, m. Let's consider the gravitational force between you and the Earth.
As above, your mass is m and your acceleration is a. You can think of R as the Earth's radius. It is clear that the force that you exert on the Earth is a large as the force that the Earth exerts on you.
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