M3 - Conceptual Q - Lowest Speed: Apex Highest Speed:...

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Name: Sharan Multani Name: M3 - Conceptual Questions Q1.) Which positions along the projectile motion parabola has the maximum speed? Which positions along the projectile motion parabola has the minimum speed? Explain. Ans1.) Above is the trajectory of a projectile. There are 2 points where the projectile has maximum speed and only one point when the speed is the lowest. The first is the beginning of the motion. This is when the motion just initiates. As the projectile moves the speed keeps reducing as it reaches its apex. And it achieves its lowest speed at the apex. From the apex, as the projectile continues to move forward the particle is under the influence of gravity. Gravity gives the body acceleration and increases its speed. Therefore it achieves high speed when it come back down to the ground.
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Unformatted text preview: Lowest Speed: Apex Highest Speed: Initial and End. Q2.) Sometimes two skydivers share one parachute. How much larger is going to be their speed when they touch the ground compared to a single skydiver? Assume that both skydivers have the same weight. Ans2.) The formula to find the final velocity of a body is: = + v2 u2 2gh Here, v=final velocity u=initial velocity g=acceleration due to gravity h=height The speed of a body falling under the influence of gravity is not related to the mass of the body. This can be proved by the above equation too. The final velocity is independent of the mass of the body. Therefore the speed of the person falling alone is going to be the same as the speed of the person falling with two people. Speed of 2 people falling together = speed of 1 person falling alone....
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This note was uploaded on 02/14/2011 for the course PHYS 220 taught by Professor Chang during the Fall '09 term at Purdue University-West Lafayette.

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M3 - Conceptual Q - Lowest Speed: Apex Highest Speed:...

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