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Ex_a=constant

# Ex_a=constant - 1-D Particle kinematics Constant...

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1-D Particle kinematics – Constant acceleration motion 0 2 0 0 2 2 0 0 1 2 2 ( ) at x x t at a x x υ υ υ υ υ = + = + + = + – Constant velocity motion 0 0 x x t υ υ υ = = + Example 1. A particle is moving along a straight line with constant acceleration. Measured from a chosen reference frame, the particle‘s position is +2 m at t = 0, and it is at the origin when t = 10 s. If the particle is observed to change its direction of motion at t = 6 s, find the acceleration. ( Ans : 0.2 m/s 2 ) 2. A man running at a speed of 2 m/s starts to accelerate at t = 0 with a constant acceleration of 0.4 m/s 2 for 10 s. He maintains his top speed for 5 minutes and then slows down with a constant deceleration. If the man runs a total distance of 1900 m from t = 0 to the time he stops, find his deceleration.

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