• 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?
EmpowerTitle:Relationship between acceleration, velocity and positionApparatus: 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
Discussion:The graph shows that the position changes linearly as afunction of time. A linear fit to the position vs. timecurve gives the slope to be 0.45 m/s. This constantvalue corresponds to the average and instantaneousvelocities for this experiment. Furthermore, it is withinexperimental error of the mean of the velocity vs. timecurve (0.46 m/s). Taking the slope of the velocity vs.time curve, we find that it is zero and therefore havezero acceleration
VelocityIn Kinematics: Rate of change of the position of anobject, equivalent to a specification of its speed anddirection 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
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
ChangeinVelocity Acceleration( m / s2 ) ElapsesTime The rate of change of v v v a(m / s 2 ) velocity t t tDefined as : The Vector quantity rate at whichthe velocity of a SI unit : meter body changes per second with time squared (m/s2) Acceleration
Instantaneous Acceleration The magnitude of the Represents the acceleration is given by acceleration over an the rate of change of infinitesimal interval ofvelocity in both magnitude timeand direction at that point v a lim t 0 t
Brakes in your cycle Sport APPLICA Soccerathletes TION players Robot applications
Brakes in bicyclewhen you apply brakes in your cycle, its speed reduceswhich means its speed has changed and so there hasbeen a change in velocity as wellOn a slope, the speed of the cycle keeps onincreasing, so there is also a change in velocityAt a turn, a driver turns the vehicle and its direction ischanged even if somehow its speed is maintained thesameIn almost all the motions in our daily lives, velocitychanges
RoboticIn robot applications, straight-line pick-and-place motions areused for transferring work pieces into and out of an assembly ormachinethe accuracy of positioning the work pieces at the beginningand end of travelThe straight-line motion also exhibits great potential forreducing manufacturing cycle time.The design and analysis of a robotic end-effector that is capableof grasping objects of varying sizescentre point of the end-effector remains as close as possible tothe same location, for example a straight-line, over the range ofpick-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.