Which One Of The Objects Listed Below Has The Largest Size?

Round Motion - Detailed Assist

Consignment CG1: Speed and Velocity

Objectives:

The student should be able to distinguish between the concepts of speed and velocity and apply such concepts to depict the motility of objects in a circle.

The student should be able to identify and draw the direction of the velocity vector for an object moving in a circle and identify the variables effecting the magnitude of the velocity.

Reading:

The Physics Classroom - Round Movement Unit of measurement, Lesson 1, Part a

	Speed is a ____ quantity and velocity is a ___ quantity.
	Definition of Speed : The speed of a moving object refers to how fast the object is moving. It is the distance traveled per unit of fourth dimension. Definition of Velocity : The velocity of a moving object is the rate at which the object changes its position.
	Speed is a scalar quantity which is fully expressed past magnitude lone. Velocity is a vector quantity which is expressed past both magnitude and direction. Suppose that you are driving your car at 55 mi/hour along a road while heading east. At that instant, the speed of your car is 55 mi/hour. The velocity of your car is 55 mi/hr, east. Note that the velocity is expressed with a magnitude (55 mi/60 minutes) and a direction (east). And notation that the velocity is but the speed value with a direction.
	Is speed a scalar or a vector? What virtually velocity?

A ___ quantity has both magnitude and management. A ___ quantity has magnitude solitary. Place the ii terms which fill the blanks in their corresponding guild.

Definition of a Scalar :

A scalar is a quantity which is fully described by magnitude alone.

Definition of a Vector :

A vector is a quantity which is fully described by both a magnitude and a management.

What is the departure betwixt a scalar and a vector quantity?

	TRUE or False: An object can move in a circle at a constant speed and still accept a changing velocity. (NOTE: Your bodily true-fake statement is selected at random from a drove of choices and may differ from the above.)
	Definition of Dispatch : The dispatch of an object is the rate at which the object changes its velocity.
	Accelerating objects are changing their velocity. Velocity is oft thought of every bit an object's speed with a direction. Thus, objects which are accelerating are either speeding upwards, slowing down or changing directions. Irresolute the velocity in any one of these iii means would exist an example of an accelerated motion. A car could be moving in a circle and have a speedometer reading that remains constant at 25 mi/hr. However, the direction which the motorcar is moving is irresolute. This change in direction means that the automobile is irresolute its velocity.
	Tin an object move with a constant speed and have a changing velocity?

	An object is moving in a circle. The velocity of the object at whatever given moment is directed ____.
	Velocity Vector: A vector is a quantity which is fully described past both a magnitude and a direction. Velocity is a vector which has a magnitude and management. The magnitude (or value) of the velocity is the object's speed. The direction of the velocity vector is the direction which the object is moving.
	Picture a circle (or improve off, draw 1) and picture an object moving along the path traced out by the circle. Suppose that it's a car with a big humongous arrow pointing straight out its forepart. (Try non to express mirth.) The management which the arrow points is the direction which the auto is moving. (Run into Physics Rules department above.) At all points along the circle, the arrow is pointing in a direction which would intersect the circle at a single point. Such a management is described equally being tangent to the circle. Equally the car makes the big turn effectually the circumvolve, the management may alter from due north, to northeast, to east, to southeast, to south, etc. However, these directions can all exist described as being tangent to the circle at the point on the circle where the car is located at that specific instant in time.
	What is the direction of the velocity when moving in a circumvolve?

	An object is moving in a circle at a constant speed in a 'clockwise manner.' A 'God'southward centre' view of the circle and the object'south location is shown. The vector pointer which best represents the management of the velocity at the indicated location is ____.
	Velocity Vector: A vector is a quantity which is fully described by both a magnitude and a direction. Velocity is a vector which has a magnitude and direction. The magnitude (or value) of the velocity is the object's speed. The direction of the velocity vector is the direction which the object is moving.
	Picture a circle (or better off, depict one) and picture an object moving along the path traced out past the circle. Suppose that it'due south a car with a big humongous arrow pointing straight out its front. (Effort non to laugh.) The direction which the arrow points is the direction which the car is moving. (Run across Physics Rules section above.) At all points along the circle, the arrow is pointing in a direction which would intersect the circumvolve at a unmarried signal. Such a direction is described as beingness tangent to the circle. As the machine makes the big plough effectually the circle, the direction may change from due north, to northeast, to east, to southeast, to southward, etc. However, these directions can all be described as being tangent to the circle at the point on the circumvolve where the car is located at that specific instant in time.
	What is the management of the velocity when moving in a circle?

	An object is moving in a circle at a constant speed in a 'clockwise mode.' A 'God'due south eye' view of the circle and the object'south location is shown. The vector pointer which best represents the direction of the velocity at the indicated location is ____.
	Velocity Vector: A vector is a quantity which is fully described by both a magnitude and a management. Velocity is a vector which has a magnitude and direction. The magnitude (or value) of the velocity is the object's speed. The direction of the velocity vector is the direction which the object is moving.
	Picture a circle (or better off, draw i) and flick an object moving along the path traced out by the circle. Suppose that information technology'south a car with a big humongous arrow pointing direct out its front. (Try not to laugh.) The direction which the pointer points is the direction which the car is moving. (Run into Physics Rules department above.) At all points along the circle, the pointer is pointing in a direction which would intersect the circle at a single point. Such a direction is described as beingness tangent to the circle. Equally the automobile makes the large turn around the circle, the direction may change from north, to northeast, to east, to southeast, to south, etc. However, these directions can all be described as being tangent to the circle at the bespeak on the circumvolve where the automobile is located at that specific instant in time.
	What is the direction of the velocity when moving in a circle?

	4 objects are attached to a 1-meter long string at various locations. The cord is held at one end and twirled in a circle. The object which moves with the greatest speed is object ___.
	Definition of Speed : The speed of a moving object refers to how fast the object is moving. It is the distance traveled per unit of time.
	Here y'all are asked to compare the speed of 4 objects moving in a circle. The four objects are attached to a string which is being whirled in a circle. The period is the fourth dimension for one revolution around the circle. All the objects make a single path around the circle in the aforementioned amount of fourth dimension (since they are attached to the same string and moving together). Each object has the aforementioned period. Speed is the distance traveled per unit of fourth dimension. Since the period is the same for each object, the object which travels the greatest distance during this menstruum volition have the greatest speed. The object which is closest to the center of the string is moving in a modest, tight circle. The object furthest from the eye is moving in a big circle and moves the greater distance in the same period.
	How does the radius of an object's circle effect the speed of the object?

	Four objects move in circles at unlike speeds. The radius and the period are listed below. Rank these four objects in increasing social club of their speed, beginning with the slowest. List the iv letters with no spaces or commas between messages.
	Definition of Speed : The speed of a moving object refers to how fast the object is moving. It is the distance traveled per unit of measurement of time.
	Here you are asked to compare the speed of four objects moving in a circumvolve. The iv objects move in generally different circles in different amounts of fourth dimension. The equation for determining the speed of such objects is described in the Formula Fix section below. As seen in the formula, the speed is dependent upon the R/T ratio. Every bit the R/T ratio increases, the speed increases. So the ranking of the four objects in increasing order of speed will follow the aforementioned ranking of the ratio of R/T. It's time to use your calculator!
	The average speed of an object tin can be determined as the ratio of the overall distance traveled per time of travel: ave. speed = distance / fourth dimension For objects which move in a circumvolve, the speed ( v ) is the ratio of the circumference of the circle to the period ( T ) or fourth dimension for i revolution. v = 2 • PI • R / T R in the higher up equation represents the radius of the circumvolve.
	How are the radius of a circumvolve and the menstruum related to the speed?