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# Dynamics of Rigid Bodies

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• Pages: 3
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• Category: Body

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* Linear Speed â€“ The time rate of motion of a point along its path, or the rate at w/c a point is â€śapproachingâ€ť or receding form another point in its path.

The 100 meter dash ends at the end of the straight-away.

* Angular speed â€“ The time rate of turning of a body about axis. Or the rate at w/c a line on a revolving body is changing direction and is expressed in angular units per unit of time.

A carousel or merry-go-round is an amusement ride consisting of a rotating circular platform.

* Uniform speed â€“ speed is uniform when equal spaces are passed over in equal time however small intervals into w/c the time is divided.

Silent Drill Platoon is the model of military precision.
* Variable speed â€“ speed is variable when unequal spaces are passed over in equal intervals of time.

Drag racing is a competition in which specially prepared automobiles or motorcycles compete two at a time to be the first to cross a set finish line, from a standing start, in a straight line, over a measured distance, most commonly ÂĽ mile (402 m).

* Velocity â€“ includes direction sense as well as speed.

The roller coaster is a popular amusement ride developed for amusement parks and modern theme parks. In essence a specialized railroad system, a roller coaster consists of a track that rises in designed patterns, sometimes with one or more inversions (such as vertical loops) that turn the rider briefly upside down. * Linear Velocity â€“ is not fully defined unless the direction and sense and the rate at w/c it is moving are known.

The golf ball direction and its velocity will be affected once the golfer hits the ball

* Angular velocity â€“ The rate of change of angular displacement with respect to time.

The Ferris wheel will create an angular velocity with a set of time.

* Linear Acceleration â€“ the time rate of change of linear velocity.

The golf ball direction and its velocity will be affected once the golfer hits the ball

* Tangential Acceleration â€“ any change in the speed takes place in a direction tangent to the path of the point.

The roller coaster will increase its velocity and change the time rate as its speed takes place in a direction tangent to the path of the point.

* Normal Acceleration â€“ in direction takes place normal to the path if the speed is increasing the acceleration is positive.

Drag racing is a competition in which specially prepared automobiles or motorcycles compete two at a time to be the first to cross a set finish line, from a standing start, in a straight line, over a measured distance, and increasingly accelerate to the finish line.

* Retardation or Deceleration â€“ The speed is decreasing, the acceleration is negative.

When a driver sees the traffic light turns orange he/she should decelerate before it reaches red light.

* Uniform Acceleration â€“ takes place if the speed changes by the same amount during an equal time intervals.

A Silent Drill Platoon changes their speed with the amount of an equal time intervals during their routines.

* Variable Acceleration â€“ is when the speed changes by different amount during an equal time of intervals.

During a Lap Race the cars have different speed but with an equal time intervals.

* Angular Acceleration â€“ is when the time rate of change of angular velocity.

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