Nothing great will ever be achieved without great men, and men are great only if they are determined to be so. For glory gives herself only to those who have always dreamed of her. – **Charles De Gaulle**

# Lecture 3 Motion in a Plane

00:02:11 Displacement in two dimension (Displacement in a plane)

00:09:02 Average Velocity & Instantaneous Velocity in two dimension

00:17:55 Average Acceleration & Instantaneous Acceleration in two dimension

00:24:25 Equations of motion in two dimensions

00:38:19 Example 4.4 The position of a particle is given by r=3.0ti+2.0t^2j+5.0k, where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find v(t) and a(t) of the particle. (b) Find the magnitude and direction of v(t) at t = 1.0 s.

00:48:49 Working with Trigonometry Table of all angles

00:52:39 Example 4.5 A particle starts from origin at t = 0 with a velocity 5.0 î m/s and moves in x-y plane under action of a force which produces a constant acceleration of (3.0i+2.0j) m/s^2. (a) What is the y-coordinate of the particle at the instant its x-coordinate is 84 m ? (b) What is the speed of the particle at this time ?

01:02:49 Using Log Table in Calculations