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happyphysics.com Physics Lecture Resources Prof. Mineesh Gulati Head-Physics Wing Happy Model Hr. Sec. School, Udhampur, J&K Website: happyphysics.com
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Ch 3 Motion in two or three dimensions © 2005 Pearson Education
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3.1 Position and Velocity Vectors Position Vector © 2005 Pearson Education
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Average velocity vector © 2005 Pearson Education
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Instantaneous velocity © 2005 Pearson Education
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Components of instantaneous velocity © 2005 Pearson Education
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3.2 The Acceleration Vector Average acceleration vector Instantaneous acceleration vector © 2005 Pearson Education
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Components of instantaneous acceleration © 2005 Pearson Education
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Parallel and perpendicular components of Acceleration © 2005 Pearson Education
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Magnitude of v increase Direction not change Direction change Magnitude constant © 2005 Pearson Education
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Constant speed Increasing speedDecreasing speed © 2005 Pearson Education
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Example 3.4 Find the parallel and perpendicular components of the acceleration at t=2.0s ANS: © 2005 Pearson Education
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3.3 Projectile Motion A projectile is any body that is given an initial velocity and then follows a path determined entirely by the effects of gravitational acceleration and air resistance © 2005 Pearson Education
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Example 3.6 What her acceleration at point G,H and I after she flies off the ramp? Neglect air resistance ANS: © 2005 Pearson Education
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Motion in a Circle When a particle moves in a circle with constant speed, the motion is called uniform circular motion When a particle moves in a circle with constant speed, the motion is called uniform circular motion © 2005 Pearson Education
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Uniform Circular Motion © 2005 Pearson Education
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Non-Uniform Circular Motion © 2005 Pearson Education
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3.5 Relative velocity in two dimensions Velocity of point P relative to frame of reference A Velocity of point P relative to frame of reference B Velocity of B relative to A © 2005 Pearson Education
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Relative velocity in three dimensions © 2005 Pearson Education
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Example 3.15 The compass of an airplane indicates that it is headed due north, and its airspeed indicators shows that it is moving through the air at 240km/h. If there is a wind of 100km/h from west to east, what is the velocity of the airplane relative to the earth? ANS: © 2005 Pearson Education
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END Visit: happyphysics.com For Physics Resources
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