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

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

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

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

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

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

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

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

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

Thanks