Edexcel AS Physics Unit 1 : Chapter 3: Rectilinear

Motion

Prepared By: Shakil Raiman

3.1 Speed, Velocity and Acceleration

Speed: Rate of change of distance.Velocity: Rate of change of displacement.Acceleration: Rate of change of velocity. Instantaneous Velocity: Velocity at an

instant.Average speed: total distance travelled/

total time taken

3.2 Equation of Motion

s = displacement or distance (m) u = initial velocity (ms-1) v = final velocity (ms-1) a = acceleration (ms-2) t = time (s) h = height (m) g = gravitational acceleration (ms-2)

3.2 Equations of motion (Horizontal Plane)

atuv

tvu

s2

)(

2

2

1atuts

asuv 222

3.3 Equations of motion (Vertical Plane-moving downward)

gtuv

tvu

s2

)(

2

2

1gtuts

ghuv 222

3.4 Equations of motion (Vertical Plane-moving upward)

gtuv

tvu

s2

)(

2

2

1gtuts

ghuv 222

3.5 Equations of Projectile motion

if air resistance is negligible

due to g the vertical part follow the equations of motion in vertical plane.

cosuux

sinuu y

xx uv

3.5 Equations of Projectile motion

Flight time,

maximum height,

Range, R is max at =45

g

uT

sin2

g

uh

2

sin 22

max

g

uR

2sin2

Thank You All

Wish you all very good luck and excellent result.