1-D Particle Kinematics – 1-D motion with constant acceleration Initial kinematic quantities at the starting time: Initial position x0and initial velocity υ0. – Constant acceleration motion 02002200122 ()atxxtata xxυυυυυ=+=++= +−– Constant velocity motion 00xxtυυυ==+Example 1. A particle is moving along a straight line with constant acceleration. Measured from a chosen reference frame, the particle‘s starting position is +2 m at t= 0. The particle is observed to move to the origin with a velocity of 0.8 m/s when t= 10 s. Find the time instant when the particle change its direction of motion. (Ans:6 s) 2. Free fall: A ball is thrown upward at the corner of a building as shown. It takes 5 s for the ball to hit the ground. Find the maximum height of the ball habove the starting point.
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