hi please, help with number 4 thanks youuu! Joanna and her brother are sking together in a 5 ski zone while Joanna is holding theend of a rope tied to her brother They are both moving at a velocity of 7 20kph on asioping portion of the ski slope Joanna notices that they are approaching a steep skislope She then pulis the rope with an average force of 7 Newtons If the angie of therope will not change at 20 from the horizontal, and the coefficient of kinetic trictionDetween her brother and the ground is 0.10, determine (a) the time required for herbrother's speed to be cut in half, and (b) the distanice traveled in this time2 A 5.50kg block starts from rest arid slides on a 30 wedge, which is supiported by ahorzontal surface The weight of the wedge is 13.70kg If we neglect the effect offriction, determine (a) the acceleration of the wedge and (b) the acceleration of the blockin relation to the wedge3 A2 50kg textbook is forced against a horizontal spring af negligibie mass and having aspring constant equal to 250 N'm. The textbook compresses the spring to a distance of250mm When the textbook is released, it slides on a horizontal surface with coefficientof kinetic friction equial to 0.30. How far does the textbook move?4 If the coefficient of kinetic triction between tires and dry pavement is 0 80, and in wetpavement is 0.25a What is the shortest distance in which you can stop a car with a velocity of28.70m/s on a dry pavement?b How fast should you dive on a wet pavement in order to be able to stop in thesame distarice as in question (4a)?5 Given a system of pulley below Biock A has a mass of 50 kg. At point P it is recorded tohave a velocity equal to 12 mis with an increasing acceleration of 6 Deterine thepower input to Motor at Mat this instant if its efficiency is given to be 0.80.

Answered: Image /qna-images/answer/1324ed63-8ea2-41b2-ac2c-c402fd30bcc6.jpg

4 If the coefficient of kinetic triction between tires and dry pavement is 0 80, and in wet pavement is 0.25 a What is the shortest distance in which you can stop a car with a velocity of 28.70m's on a dry pavement? b How fast shculd you drive on a wet pavement in order to be able to stop in the same distance as in question (4a)?

4 If the coefficient of kinetic triction between tires and dry pavement is 0 80, and in wet pavement is 0.25 a What is the shortest distance in which you can stop a car with a velocity of 28.70m's on a dry pavement? b How fast shculd you drive on a wet pavement in order to be able to stop in the same distance as in question (4a)?

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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