Reducing and Increasing Friction

Page 1 <img data-url='document/reducing-and-increasing-friction.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/1.jpg' width='140' height='200' /> Page 2 <img data-url='document/reducing-and-increasing-friction.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/2.jpg' width='140' height='200' /> Situation A

Page 3 <img data-url='document/reducing-and-increasing-friction.html?page=3' data-page='3' class='cut-thumb lazyload' alt='Page 3: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/3.jpg' width='140' height='200' /> Situation B

Page 4 <img data-url='document/reducing-and-increasing-friction.html?page=4' data-page='4' class='cut-thumb lazyload' alt='Page 4: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/4.jpg' width='140' height='200' /> Observation: It is easier to pull the load in Situation B than

the load in Situation A.

Inference: Because there is less friction in Situation A than

Situation B.

Situation A Situation B

Page 5 <img data-url='document/reducing-and-increasing-friction.html?page=5' data-page='5' class='cut-thumb lazyload' alt='Page 5: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/5.jpg' width='140' height='200' /> Page 6 <img data-url='document/reducing-and-increasing-friction.html?page=6' data-page='6' class='cut-thumb lazyload' alt='Page 6: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/6.jpg' width='140' height='200' /> oil water

wax grease

Page 7 <img data-url='document/reducing-and-increasing-friction.html?page=7' data-page='7' class='cut-thumb lazyload' alt='Page 7: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/7.jpg' width='140' height='200' /> Page 8 <img data-url='document/reducing-and-increasing-friction.html?page=8' data-page='8' class='cut-thumb lazyload' alt='Page 8: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/8.jpg' width='140' height='200' /> Page 9 <img data-url='document/reducing-and-increasing-friction.html?page=9' data-page='9' class='cut-thumb lazyload' alt='Page 9: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/9.jpg' width='140' height='200' /> Page 10 <img data-url='document/reducing-and-increasing-friction.html?page=10' data-page='10' class='cut-thumb lazyload' alt='Page 10: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/10.jpg' width='140' height='200' /> Page 11 <img data-url='document/reducing-and-increasing-friction.html?page=11' data-page='11' class='cut-thumb lazyload' alt='Page 11: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/11.jpg' width='140' height='200' /> Page 12 <img data-url='document/reducing-and-increasing-friction.html?page=12' data-page='12' class='cut-thumb lazyload' alt='Page 12: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/12.jpg' width='140' height='200' /> Page 13 <img data-url='document/reducing-and-increasing-friction.html?page=13' data-page='13' class='cut-thumb lazyload' alt='Page 13: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/13.jpg' width='140' height='200' /> Making patterns on thesoles of the shoes.

Making patterns on the surface of the

tyre.

Page 14 <img data-url='document/reducing-and-increasing-friction.html?page=14' data-page='14' class='cut-thumb lazyload' alt='Page 14: Reducing and Increasing Friction' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader033.cupdf.com/reader033/viewer/2022061123/54751d69b4af9fc70e8b4583/html5/thumbnails/14.jpg' width='140' height='200' /> Using rough surfaces……

Carpet

anti-slip mat

Reducing and Increasing Friction

Documents

situation b situation

situation b observation

oil water wax grease