3. • How the cars accelerate?
• Are the acceleration and velocity is depending to
each other?
• If the acceleration is constant, thus the
magnitude of the velocity changed?
• If the car is speeding up uniformly in the reverse
direction, what happened to the magnitude and
the direction of the car’s acceleration
• A car is moving with a constant positive velocity.
What is the acceleration of the car?
4. Empower
Title:
Relationship between acceleration, velocity and
position
Apparatus:
Air Track with Air Supply
Laboratory Lift or Wooden block
Cart with rectangular 100 mm flag attachment
Motion sensor and reflector 2x4
Pasco dynamics track and cart
Lab jack
9. Discussion:
The graph shows that the position changes linearly as a
function of time. A linear fit to the position vs. time
curve gives the slope to be 0.45 m/s. This constant
value corresponds to the average and instantaneous
velocities for this experiment. Furthermore, it is within
experimental error of the mean of the velocity vs. time
curve (0.46 m/s). Taking the slope of the velocity vs.
time curve, we find that it is zero and therefore have
zero acceleration
10. Velocity
In Kinematics: Rate of change of the position of an
object, equivalent to a specification of its speed and
direction of motion
Consists of two independent components: Speed &
Direction
Displacement
Vector quantity Velocity(m / s)
Time
metres per second (m/s or m⋅s-1) /
Constant velocity : Object must have a constant
speed in a constant direction
Constant direction : object in a straight path motion
11. Instantaneous Velocity
Defined as the velocity of an
object at an instant
The limiting value of the
average velocity of the
object in a small time x
interval around that v lim
instant, when the time t 0
interval approaches
t
zero
12. ChangeinVelocity
Acceleration( m / s2 )
ElapsesTime
The rate of
change of v v v
a(m / s 2 )
velocity t t t
Defined as : The Vector quantity
rate at which
the velocity of a SI unit : meter
body changes per second
with time squared (m/s2)
Acceleration
13. Instantaneous Acceleration
The magnitude of the
Represents the
acceleration is given by
acceleration over an
the rate of change of
infinitesimal interval of
velocity in both magnitude
time
and direction at that point
v
a lim t 0
t
14. Brakes
in your
cycle
Sport APPLICA Soccer
athletes TION players
Robot
applications
15. Brakes in bicycle
when you apply brakes in your cycle, its speed reduces
which means its speed has changed and so there has
been a change in velocity as well
On a slope, the speed of the cycle keeps on
increasing, so there is also a change in velocity
At a turn, a driver turns the vehicle and its direction is
changed even if somehow its speed is maintained the
same
In almost all the motions in our daily lives, velocity
changes
16. Robotic
In robot applications, straight-line pick-and-place motions are
used for transferring work pieces into and out of an assembly or
machine
the accuracy of positioning the work pieces at the beginning
and end of travel
The straight-line motion also exhibits great potential for
reducing manufacturing cycle time.
The design and analysis of a robotic end-effector that is capable
of grasping objects of varying sizes
centre point of the end-effector remains as close as possible to
the same location, for example a straight-line, over the range of
pick-and-place motion.
17. Moral Values
• From the concept of straight line motion, people
will know how to drive safely because they can
control their speed and acceleration when they
are drives.
• we also can be a punctual person. We can
estimate the time to go to work if we know the
distance between our office and know to drives
at what speed in order to reach the office on
time.
18. Unique Features of This Activity
• We can measured acceleration, speed and
velocity simultaneously.
• In addition, students also can compare the
results with other group and pose the
questions
• Less work need to be done by the students.
• The learning process becomes meaningful and
more interactive.
