1. Mohammad Morsheduzzaman Lecturer, Physics
Cantonment Public School & College, Momenshahi

2. Dynamics
Some Definitions
Mean velocity, Instantaneous velocity, Uniform Velocity, Average acceleration, Instantaneous acceleration, Relative velocity.

3. Dynamics Displacement vs Time graph Uniform Velocity 1 2 3 4 5 10 15
Time(sec) 1 2 3 4
Displacement(m) 5 10 15 20
Displacement(m) 20 15 10 5
Time(sec) 1 2 3 4

4. Dynamics Determination of velocity from Displacement vs Time graph P
Displacement(m) P ∆S
Time(sec) ∆t M

5. Displacement(m) 1 2 ∆S ∆S ∆t
Time(sec)

6. Dynamics Displacement vs Time graph Non uniform velocity 1 2 3 4 5 13
Time(sec) 1 2 3 4
Displacement(m) 5 13 20 22
Displacement(m) 20 15 10 5
Time(sec) 1 2 3 4

7. Dynamics Velocity vs Time graph 1 2 3 4 5 Velocity(ms-1) Time (sec)
Uniform Velocity
Time (sec) 1 2 3 4
Velocity (ms-1) 5
Velocity(ms-1) 10 5
Time (sec) 1 2 3 4

8. Dynamics Velocity vs Time graph 1 2 3 4 5 10 15 20 Velocity (ms-1)
Non Uniform velocity
(Uniform acceleration)
Time(sec) 1 2 3 4
Velocity (ms-1) 5 10 15 20
Velocity (ms-1) 20 15 10 5
Time (sec) 1 2 3 4

9. Dynamics Velocity vs Time graph 1 2 3 4 5 13 20 22 Velocity(ms-1)
Non uniform Velocity
(Non uniform acceleration)
Time(sec) 1 2 3 4
Velocity(ms-1) 5 13 20 22
Velocity(ms-1) 20 15 10 5
Time (sec) 2 3 1 4

10. Thanks