Spinning Bottle

NEWTON'S THIRD LAW OF MOTION

Newton's Third Law of Motion consist of three different laws.

1.) If a certain object experiences no net force, then its velocity is constant, the object then is either at rest (with a velocity of zero) or it keeps at a constant speed.

2.) The acceleration a of an object is directly proportional to the net force F acting on the object, and such then it is also directly proportional to the mass M. Therefore F=Ma.

3.) When an object exerts a force F1 on a second object, reciprocally the second object exerts a second force F2=-F1 on the first object.

Then so, forces F1 and F2 are both equal in motion but opposite in direction.

The whole main point here was that the less water the bottle had, the slower it spun. So it started with a really high speed of rotation but slowly went decreasing.

Materials

Here is a list of the Materials that were used during the experiment.

Not many things required as you can see.

- 500 mL Empty Water Bottle

- 2 Pieces of Straw

- Scissors

- Thread

- Glue/Silicon

- Water

This simple experiment demonstrates Newton’s third law of motion -

that every action has an equal and opposite reaction.

Physics Behind the Project

This simple experiment demonstrates

Newton’s Third Law of Motion - that every action has an equal

and opposite reaction.

This law is sometimes referred to as the action-reaction law,

with FA called the "action" and FB the "reaction".

The action and the reaction are simultaneous,

and it does not matter which is called the action and

which is called reaction; both forces are part of a single

interaction, and neither force exists without the other

The two forces in Newton's third law are of the same type

(e.g., if the road exerts a forward frictional force on an

accelerating car's tires, then it is also a frictional force that

Newton's third law predicts for the tires pushing backward

on the road).

Results

The bottle effectively did spin due to the water force,

some water was exiting through Hole a,

and the other rest was exiting through Hole B,

causing the bottle to spin by itself.

Procedure

The following steps are

1. Grab a bottle of 500 mL

2. Make two holes at the bottom of the bottle, at a 45 Degree angle separation, Something similar like the picture shown below

3. Cut two pieces of Straw, make sure they are equally in size, and insert them into the two wholes you had made in the previous step. After you have insterted them, you need to glue the straws onto the bottle and seal any openings there might be on the outside of the straw.

4. After you have glued the straws into the bottom holes, You will need to make two holes but on the very top of the bottle. And you will insert a 15 cm thread across the holes, this is to hang the bottle from the thread while the water works its forces on the bottle.

5. After you have done the holes on the top of the bottle, and insterted the threads, you

need to cover the straw holes and start filling up the bottle with water until it is full.

6. After the bottle water is full, you need to grab it from the thread, and let go of the straw holes, And you will see, how the water's force takes action on the rotation of the bottle.

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