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i need an experiment so that i have an exmple on a way to prove or test my hypothesis which is that gravity causes the speed of motion to slow

2007-04-02 11:00:21 · 9 answers · asked by TiTi 1 in Science & Mathematics Physics

9 answers

That causes WHAT motion to slow? A ball being thrown upward? I'm not sure that an experiment can demonstrate that it is gravity and not the ball magnet fairy underground pulling it down.

A more testable hypotheses is that something pulls the ball down at a fixed rate of acceleration. You could set that up with a camera that can take pictures at fixed time intervals.

2007-04-02 11:06:46 · answer #1 · answered by Anonymous · 0 0

The classic experiment is to drop two objects of different mass (M and m) from the same height (h) and measure how long it took (t) each to reach h = 0. .

You will find that T(for M) = t(for m); that is, both objects take the same amount of time to reach h = 0 no matter what their masses might be. Then from h = vt = VT = Vt, we find that V = v the final velocites for both masses dropped from h.

And then V = GT = Gt = gt = v, where G and g are the respective accelerations on the large and small masses, due to gravity. But, as T = t from our experiment, G = g. No matter the size of the masses, they will accelerate at the same rate. And they will impact at h = 0 with identical velocities.

This outcome will not work for objects affected by air drag, but a bowling ball (M) and a golf ball (m) will work just fine because they are little affected by drag forces.

Physics learned from this experiment: The acceleration due to gravity on Earth's surface is constant. Thus G(M) = g(m) = g no matter what the size of mass dropped.

This is a remarkable, but counter intuitive result. Before Newton discovered this, people just naturally thought heavier objects would fall faster than lighter objects. Why? Because W = MG and w = mg; where W and w are the weights of the bigger and smaller masses. But when they looked at the ratios W/w = MG/mg they discovered that the g's cancelled out each time; so that W/w = M/m and W = w(M/m) which meant the weights were always proportional to the respective masses. Thus the g's had to be the same (G = g) no matter what the mass was....weird.

2007-04-02 11:26:40 · answer #2 · answered by oldprof 7 · 1 0

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2016-11-25 21:30:33 · answer #3 · answered by ? 4 · 0 0

Compare a young person's bod with an old lady bod. Gravity effects the movement. lol

2007-04-02 11:03:23 · answer #4 · answered by Anonymous · 0 1

Bowling?

2007-04-02 11:02:41 · answer #5 · answered by Year of the Monkey 5 · 1 0

Throw a ball and watch it hit the floor.

2007-04-02 11:02:56 · answer #6 · answered by **ic** 4 · 0 1

have someone throw a baseball, and then clock the ball's speed at various points in its trajectory.

2007-04-02 11:03:26 · answer #7 · answered by mighty_power7 7 · 0 1

Catapaulting things upwards, and seeing how far they go.

2007-04-02 11:03:24 · answer #8 · answered by Anonymous · 0 1

ticker tape....place it on the end of a trolley...

2007-04-02 11:03:57 · answer #9 · answered by Anonymous · 0 1

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