8 (1) (H) A 1200 kg car driving downhill goes from an altitude of 70 m to 40 m above sea level and accelerates from 11 m/s to 23 m/s. (b) (c) (d) How much potential energy did the car lose? How much kinetic energy did it gain? How much energy is unaccounted for? Where did this energy go? Consider a pendulum with mass m hanging from the ceiling by a massless string of length 1.0 m, as shown in Figure 4.2. The particle is released from rest, when the angle between the string and the downward vertical direction is 30°. Given sin 30° = 0.5 and cos 30° -0.866. The acceleration due to gravity is 9.8 m/s². Calculate the speed of the particle when it reaches the lowest point of its arc. You should write your answer to three decimal places. m 30°

8 (1) (H) A 1200 kg car driving downhill goes from an altitude of 70 m to 40 m above sea level and accelerates from 11 m/s to 23 m/s. (b) (c) (d) How much potential energy did the car lose? How much kinetic energy did it gain? How much energy is unaccounted for? Where did this energy go? Consider a pendulum with mass m hanging from the ceiling by a massless string of length 1.0 m, as shown in Figure 4.2. The particle is released from rest, when the angle between the string and the downward vertical direction is 30°. Given sin 30° = 0.5 and cos 30° -0.866. The acceleration due to gravity is 9.8 m/s². Calculate the speed of the particle when it reaches the lowest point of its arc. You should write your answer to three decimal places. m 30°

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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