Speed is defined as the distance covered over a period of time. Runners accelerate at the start of a race and may maintain a steady speed or accelerate again at the finish. Speedometers measure vehicle speed by connecting to a shaft that turns with the wheels. A magnet attached to the shaft spins and its movement is conveyed to a pointer through a spring-connected cup. Stopwatches were invented to time races and events. Light gates use beams to detect and time objects passing through them. Velocity refers to both the speed and direction of an object's motion. Scalar quantities only measure magnitude while vector quantities measure both magnitude and direction of movement.

1. SPEED
IT's unimaginable power

2. Speed

4. Speed
Have you ever run ?

5. Speed

If you had after a few moments after finish of this race
the times of the you and the other runners flash up on a
scoreboard. If the race was over 100 metres, or any
other distance, you may think that a runner ran the
entire distance could be worked out using the time.
However you would be wrong.

6. Speed
The runners were stationary when the starter gun
was fired so they began to run increasingly faster,
or accelerate, to get moving.
The may have run steadily for the most of the race
and then accelerated as much as they could for
the final sprint to the finish.
Speed is a measure of the distance covered by
an object in a certain time.

7. Speed
records

8. People trying to beat the land speed
record must drive their vehicle at full
speed between two markers.

9. Green monster
Art arfan drove itGreen Monster

10. Spirit of America
Spirit of America Craig Breedlove drove it

11. The Blue Flame
The Blue
Flame
Gary Gabelich drove it

12. Thrust 2Thrust 2 Richard Noble drove it

13. Thrust SSCThrust
SSC
Andy green drove it

16. Measuring speed – The
speedometer
The speedometer in a vechile is connected by a cable to a
shaft which turns the wheels. There is a wire in the cable
which is connected to the shaft by gear wheels. When the
shaft turns, the wire in the cable turns too. At the other end
of the wire is a magnet. It spins round when the vehicle's
wheel turn.

17. The magnet is surrounded by a circular metal cap which is
affected by the magnetic field generated by the spinning
magnet. The cup is made to turn, the turning effect
increasing as the speed of the spinning magnet (and the
moving vehicle ) increases. The cup is connected to a
spring and a pointer. The spring prevents the cup
spinning but also allows it to turn further as the vehicle's
speed increases. The pointer turns with the cup and
moves across the scale of the speedometer dial.

20. Do you know who found speedometer ?

21. Charles Babbage is credited
with creating an early type
of a speedometer, which
were usually fitted to
locomotives.
The electric speedometer
was invented by the
Croatian Josip Belušić in
1888, and was originally
called a velocimeter.

23. A cyclocomputer or cyclometer is a device mounted on a
bicycle that calculates and displays trip information, similar to
the instruments in the dashboard of a car. The computer with
display, or head unit, usually is attached to the handlebar for
easy viewing.
In simple words it is a bicycle informatory ( speed, pace
,distance ,etc..)

24. Cyclometer
The computer or monitor. Cyclocomputer sensor
Sensor

25. Inventor of Cyclocomputer
In 1895, Veeder invented the
Cyclometer. The
Cyclometer was a simple
mechanical device that
counted the number of
rotations of a bicycle wheel.

26. Stopwa
tch

28. What is a stopwatch
?

29. A stop watch is a handheld timepiece
designed to measure the amount of time
elapsed from a particular time when it is
activated to the time when the piece is
deactivated. A large digital version of a
stopwatch designed for viewing at a
distance, as in a sports stadium, is called a
stopclock.

30. Samuel Watson (fl. c.1687-
c.1710), was a horologist
(clock and watch maker) who
invented the 5 minute
repeater, made the first
stopwatch. He made a clock
for King Charles II and was
an associate of Isaac Newton.
Founder of Stopwatch

31. What do you
understand by the
term speed trap gun
?

32. A radar speed gun (also radar gun and speed trap
gun) is a device used to measure the speed of moving
objects. It is used in law-enforcement to measure the
speed of moving vehicles and is often used in
professional sports, for such things as the
measurement of the speed of pitched baseballs,
runners and tennis serves or speed a vehicle travels.

33. Speed trap gun
The radar speed gun was
invented by John L. Barker
Sr., who developed radar
for the military during World
War II.

35. Light gates
They detect when something goes through them and how
long it takes to cross.
The light gate has a beam going from one LED/IR light
source onto a detector. As something goes through it, the
beam is "Cut".
The light gate measure how long the beam has been cut for.
That gives you a measure for time.
Some light gates will allow you to plug in the length of the
crossing object, and then it'd automatically calculate:
Length of object/time = How fast it was traveling

36. Light Gates
Erwin Sick invented his light
gates in 1950 .
For extra information about
Erwin Sick and his
inventions :
http://www.sick.com/us/en-us/ho

37. Why do we use
distance / time
graph ?

38. A distance time graph is a visual representation of collected
data. The graph has a horizontal x axis which represents time
and a vertical y axis that represents the distance. When the
line on the graph is horizontal, then it implies that an object is
stationary and when it is straight, but sloped then the object is
moving at a steady speed.

40. In the previous image you saw the
term 'Velocity '
What means velocity in your
words ?

41. Velocity is the rate of change of the position
of an object, equivalent to a specification of
its speed and direction of motion. Example
60 km/h to the north. Velocity is an
important concept in kinematics, the branch
of classical mechanics which describes the
motion of bodies.

42. 1. Scalar is the measurement of a medium strictly in
magnitude.
2 . Vector Quantity is a measurement that refers to both the
magnitude of the medium as well as the direction of the
movement the medium has taken.

43. Examples of scalar quantity :

44. Time - Scalar quantities often refer to time;
the measurement of years, months, weeks,
days, hours, minutes, seconds, and even
milliseconds.

46. Volume - Scalar quantity can refer to the
volume of the medium, as in how much of
the medium is present. Everything from tons
to ounces to grams, milliliters and
micrograms are all scalar quantities, as long
as they are applied to the medium being
measured and not the movement of the
medium.

48. Speed and temperature - Two more commonly used
scalar quantities in physical calculations are speed and
temperature. As long as they are not associated with a
directional movement, they remain scalar quantities.
For instance, the measurement of speed in miles or
kilometers-per-hour or the measurement of the
temperature of the medium both remain scalar
quantities as long as they aren’t associated with the
direction of the medium’s travel.

51. Examples of vector quantity :

52. Vector quantities, however, refer to
both the direction of the medium’s
movement as well as the
measurement of the scalar quantity.

53. Increase/Decrease in Temperature - The measurement of the
medium’s temperature is a scalar quantity; the measurement
of the increase or decrease in the medium’s temperature is a
vector quantity.

55. Velocity - The measurement of the rate at which an object
changes position is a vector quantity. For example:
If a person quickly moves one step forward and then one
step backward there would certainly be a lot of activity; but,
there would be "zero velocity."

57. A beginning reference point for the directional measurement
in order to provide the directional element of the vector
quantity. Your beginning point could be centered in a north,
south, east and west quadrant so thats the vector quantity
can be applied to the medium’s movement. For example:
To describe a car's velocity you would have to state it as
70 miles per hour, south.
Another directional element that may be applied to the vector
quantity is the different between vertical and horizontal
movements.

58. Velocity - The measurement of the rate at which an object
changes position is a vector quantity. For example:
If a person quickly moves one step forward and then one
step backward there would certainly be a lot of activity; but,
there would be "zero velocity."

59. In order to measure the vector quantity of the medium, there
must be:
A directional measurement applied to the scalar quantity.
For example:
Regardless of how fast an object is going, the direction of
the movement must be described in the velocity vector such
as "rightwards" or "forward."

61. Thank You
Done by :
Deraj.R.M
VI-C