Data Logging for Straight Line Motion Experiment

Members:Noor Azurah Abdul Razak (D20101037502)

Wan Norazwani Mahusin(D20101037506)

Ira Nusrat Jaafar (D20101037533)

Engage

• 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?

Empower

Title:Relationship between acceleration, velocity and

positionApparatus:

Air Track with Air Supply Laboratory Lift or Wooden blockCart with rectangular 100 mm flag attachmentMotion sensor and reflector 2x4Pasco dynamics track and cartLab jack

Results:

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

VelocityIn Kinematics: Rate of change of the position of an object, equivalent to a specification of its speed and direction of motion

Constant velocity : Object must have a constant speed in a constant directionConstant direction : object in a straight path motion

( / )Displacement

Velocity m sTime

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 interval around that instant,

when the time interval approaches

zero

0lim t

xv

t

Acceleration

Defined as : The rate at which

the velocity of a body changes

with time

The rate of change of velocity

Vector quantitySI unit : meter

per second squared (m/s2)

2( / )ChangeinVelocity

Acceleration m sElapsesTime

2( / )v v v

a m st t t

Instantaneous AccelerationThe magnitude of the

acceleration is given by the rate of change of

velocity in both magnitude and direction

at that point

Represents the acceleration over an infinitesimal interval of time

0lim t

va

t

APPLICATION

Brakes in your cycle

Soccer players

Robot applicati

ons

Sport athletes

Brakes in bicyclewhen 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 wellOn a slope, the speed of the cycle keeps on increasing, so there is also a change in velocityAt 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

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.

 

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.

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.