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1. Joanna and her brother are sking together in a 5 ski zone while Joanna is holding the end of a rope tied to her brother They are both moving at a velocity of 7 20kph on a sloping portion of the ski slope Joanna notices that they are approaching a steep ski slope She then puls the rope with an average force of 7 Newtons It the angle of the rope will not change at 20 from the horizontal, and the coefficient of kinetic friction between her brother and the ground is 0 10, detemine (a) the time requred for her brother's speed to be cut in halt, and (b) the distance traveled in this time 2 A 550kg block starts from rest and slides on a 30 wedge, which is supported by a horizontal surface The weight of the wedge is 13.7Okg It we neglect the effect of friction, determine (a) the acceleration of the wedge and (b) the acceleration of the block in relation to the wedge. 3. A2 50kg textbook is forced against a horzontal spring of negligible mass and having a spring constant equal to 250 Nim. The textbook compresses the spring to a distance cf 250mm When the textbook is released, t sides on a horizontal surface with coefficient of kinetic friction equal to 030. How far does the textbook move?

1. Joanna and her brother are sking together in a 5 ski zone while Joanna is holding the end of a rope tied to her brother They are both moving at a velocity of 7 20kph on a sloping portion of the ski slope Joanna notices that they are approaching a steep ski slope She then puls the rope with an average force of 7 Newtons It the angle of the rope will not change at 20 from the horizontal, and the coefficient of kinetic friction between her brother and the ground is 0 10, detemine (a) the time requred for her brother's speed to be cut in halt, and (b) the distance traveled in this time 2 A 550kg block starts from rest and slides on a 30 wedge, which is supported by a horizontal surface The weight of the wedge is 13.7Okg It we neglect the effect of friction, determine (a) the acceleration of the wedge and (b) the acceleration of the block in relation to the wedge. 3. A2 50kg textbook is forced against a horzontal spring of negligible mass and having a spring constant equal to 250 Nim. The textbook compresses the spring to a distance cf 250mm When the textbook is released, t sides on a horizontal surface with coefficient of kinetic friction equal to 030. How far does the textbook move?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Joanna and her brother are sking together in a 5 ski zone while Joanna is holding the end of a rope tied to her brother They are both moving at a velocity of 7 20kph on a sioping portion of the ski slope Joanna notices that they are approaching a steep ski slope She then pulis the rope with an average force of 7 Newtons If the angie of the rope will not change at 20 from the horizontal, and the coefficient of kinetic triction Detween her brother and the ground is 0.10, determine (a) the time required for her brother's speed to be cut in half, and (b) the distanice traveled in this time 2 A 5.50kg block starts from rest arid slides on a 30 wedge, which is supiported by a horzontal surface The weight of the wedge is 13.70kg If we neglect the effect of friction, determine (a) the acceleration of the wedge and (b) the acceleration of the block in relation to the wedge 3 A2 50kg textbook is forced against a horizontal spring af negligibie mass and having a spring constant equal to 250 N'm. The textbook compresses the spring to a distance of 250mm When the textbook is released, it slides on a horizontal surface with coefficient of 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 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 should you dive on a wet pavement in order to be able to stop in the same 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 to have a velocity equal to 12 mis with an increasing acceleration of 6 Deterine the power input to Motor at Mat this instant if its efficiency is given to be 0.80.
Transcribed Image Text:Joanna and her brother are sking together in a 5 ski zone while Joanna is holding the end of a rope tied to her brother They are both moving at a velocity of 7 20kph on a sioping portion of the ski slope Joanna notices that they are approaching a steep ski slope She then pulis the rope with an average force of 7 Newtons If the angie of the rope will not change at 20 from the horizontal, and the coefficient of kinetic triction Detween her brother and the ground is 0.10, determine (a) the time required for her brother's speed to be cut in half, and (b) the distanice traveled in this time 2 A 5.50kg block starts from rest arid slides on a 30 wedge, which is supiported by a horzontal surface The weight of the wedge is 13.70kg If we neglect the effect of friction, determine (a) the acceleration of the wedge and (b) the acceleration of the block in relation to the wedge 3 A2 50kg textbook is forced against a horizontal spring af negligibie mass and having a spring constant equal to 250 N'm. The textbook compresses the spring to a distance of 250mm When the textbook is released, it slides on a horizontal surface with coefficient of 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 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 should you dive on a wet pavement in order to be able to stop in the same 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 to have a velocity equal to 12 mis with an increasing acceleration of 6 Deterine the power input to Motor at Mat this instant if its efficiency is given to be 0.80.
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