grade 11 kinematic and vector analysis and projectile motion
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Kinematic and Vector AnalysisPHYSICSGRADE XI2016
Position of particle
Determine the displacement of particle
Velocity of particlea.Average
velocity
Instaneous Velocityas the gradient of component r vs t
Instaneous velocity as the differential from the function of position
Determine the position from velocity
Displacement as the area under the graph v-t
Acceleration Average acceleration
Instaneous Acceleration Instaneous acceleration define as the gradient of v(t) graph
Instaneous acceleration is the differential of the velocity function to the respect of time
Determine velocity from a-t graph
A-t graph
Homework time…1. A particle moves based on the following equation :
r(t) = 3t2 − 2t + 1, t in second and r in meter.Determine : a. Velocity at t = 2 secs b. Average velocity between t = 0 sec to 2 secs
2. A particle moves based on the following equation :
If the initial position at the center of coordinate, determine the position after 3 secs
Angular Velocity
Angular velocity is defined as the result of the angular displacement devided by time
Instaneous Angular velocity is the differential of position with respect to the time
Angular position fromangular velocity
Angular accelerationMenentukan Besar Percepatan Sudut dari Kemiringan Grafik ω-t
ß is the angle between ω-t graph vs t axis.
Determine angular velocity from acceleration
ω0 is the initial angular velocity (ω at t = 0).
CIRCULAR MOTION
Tangential Acceleration
Total acceleration
Direction
KINEMATIC CIRCULAR MOTION
Exercise Convert to radian : 900 and 2700
Convert to radian/second : 120 rpm and 60 rpm A circular motion with angular acceleration 2 rad/s2. If it starts at rest.
Determine :a) Angular acceleration after it moved 5 secondsb) Angular position after it moved 5 seconds
PROJECTILE MOTION
Position and velocity equation for projectile
At X axis
At Y axis
What about the velocity at certain time
Magnitude of Velocity
Direction of velocity
How to determine the maximum heigth and the maximum range of motion?
Coordinate for maximum
height
Time taken for maximum range (t0a)
t0H is time taken at maximum heigth
Maximum range ( R )
See the following figure about projectile motion. The initial velocity is 100 m/s and the elevation 370.
1. Initial velocity to the respect of X-axis2. Initial velocity to the respect of Y-axis3. Velocity at t = 1 second4. Direction of velocity to the respect of horizontal 5. Heigth of bullet at t = 1 second6. Horizontal range of bullet at t = 1 second7. Maximum heigth8. Maximum range9. Time taken to reach maximum heigth10.Velocity at maximum heigth11.Time taken to reach maximum range