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Investigation Of Different Variables' Effect On The Rate Of Bounce Of A Squash Ball

2135 words - 9 pages

Investigation of Different Variabes' Effect on the Rate of Bounce of a Squash Ball


The aim of this experiment is to find out and observe how different
variables affect the rate of bounce on a squash ball. There are many
variables that affect the rate of this reaction such as the following:

1. Drop Height (Meters)

2. Surface (e.g. Grass, tarmac etc)

3. Temperature of ball (°C)

4. Drop/Throw (Force)

5. Air Drag

6. Angle*

7. Area

8. Mass of ball

9. Pressure of air in ball

10. Material of ball

Height of bounce between first and second bounce.

In my investigation I ...view middle of the document...

This force
is only small when the object is moving slowly, but gets larger as the
velocity of the object increases until, eventually, it equals the
accelerating force (the weight of the object), so that there is no
further acceleration. The object has then reached its terminal

As the retarding force, the drag, depends on the viscosity of the
medium (for example, air, water), and also on the area of the object
facing the direction of fall, the terminal velocity of different
objects under different circumstances varies greatly. Clearly the
terminal velocity of a stone dropped through air will be very much
greater than that of a stone dropped through water, which again would
be much greater than that of a stone dropped through syrup. The
parachute is an example of a device in which the area of the falling
object is artificially increased to lower the terminal velocity, and
free-falling parachutists spread their limbs or pull them together in
order to make themselves fall slower or faster before they finally
open their parachutes.

Acceleration - Also known as linear acceleration, rate at which the
velocity of an object changes per unit of time. Velocity is defined as
a vector-that is, it has both magnitude and direction. It follows that
an object accelerates if its speed changes, or its direction of
motion, or both. An object that is released and allowed to fall freely
accelerates downwards. An object tied to a string and swung at a
constant speed in a circle above a person's head also accelerates
uniformly; in this case, the acceleration is in the direction along
the string towards the person's hand.

When an object's speed decreases, it is said to decelerate.
Deceleration is negative acceleration.

An object accelerates only when a force is applied to it. According to
Newton's second law of motion, the change in speed is directly
proportional to the force applied (see Mechanics). A falling body
accelerates because of the force of gravitation.

Angular acceleration is distinct from linear acceleration. The angular
velocity of a rotating body is its rate of rotation-measured in, say,
revolutions per second-around a given axis. An angular acceleration is
a change in the angular velocity, which means a change in the rate of
rotation or in the direction of the axis.

Drag & Aerodynamics

The shape of an object drastically affects the degree to which air
resistance, or drag, impedes the object's motion. For example, a
sphere, top, and especially a square, bottom, both force the air to
redirect itself, slowing the objects down. An aerofoil, middle,
disturbs the air minimally as it travels, and so experiences little


Speed, distance travelled by an object in unit time. The SI unit for
speed is metres per second (m/s), and the most used...

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