38. An object of mass 100g projected vertically upwards from theground level has a velocity of 20m/s at a height of 10mcalculate it kinetic energy at the ground level. [g=10m/s²,neglect air resistance] A. 10J B. 20J C. 30J D. 50J

Name: 38. An object of mass 100g projected vertically upwards from thegroun
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Description: 38. An object of mass 100g projected vertically upwards from theground level has a velocity of 20m/s at a height of 10mcalculate it kinetic energy at the ground level. [g=10m/s²,neglect air resistance] A. 10J B. 20J C. 30J D. 50J

According to kinematics equation v2=u2-2gx Use the given values 202=u2-2×10×10u2=400+200=600 m/s

Answered: rojected vertically upwa city of 20m/s…

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rojected vertically upwa city of 20m/s at a hei gy at the ground level. 10J B. 20J C. 30J D. 50J

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Energy Of A System

Section: Chapter Questions

Problem 7.8CQ: If only one external force acts on a particle, does it necessarily change the particles (a) kinetic...

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