{"id":530,"date":"2016-06-10T16:44:00","date_gmt":"2016-06-10T11:14:00","guid":{"rendered":""},"modified":"2020-08-01T01:25:04","modified_gmt":"2020-07-31T19:55:04","slug":"textbook-answers-and-solutions-of-cbse-class-viii-science-chapter-12-friction","status":"publish","type":"post","link":"https:\/\/cbsencertanswers.com\/2016\/06\/textbook-answers-and-solutions-of-cbse-class-viii-science-chapter-12-friction.html","title":{"rendered":"TEXTBOOK ANSWERS AND SOLUTIONS OF CBSE CLASS VIII SCIENCE Chapter 12 Friction"},"content":{"rendered":"
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\n1) Fill in the blanks.<\/o:p><\/span><\/b><\/div>\n
\n(a) Friction opposes the __motion__ between the surfaces in
\ncontact with each other.<\/span><\/o:p><\/span><\/div>\n
\n(b) Friction depends on the __nature__ of surfaces.<\/span><\/o:p><\/span><\/div>\n
\n(c) Friction produces __heat__.<\/span><\/o:p><\/span><\/div>\n
\n(d) Sprinkling of powder on the carom board __reduces__ friction.<\/span><\/o:p><\/span><\/div>\n
\n(e) Sliding friction is __less__ than the static friction.<\/span><\/o:p><\/span><\/div>\n
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\n2)Four children were asked to arrange forces due to rolling,
\nstatic and sliding frictions in a decreasing order. Their arrangements are
\ngiven below. Choose the correct arrangement.<\/o:p><\/span><\/b><\/div>\n
\n(a) rolling, static, sliding<\/o:p><\/span><\/b><\/div>\n
\n(b) rolling, sliding, static<\/o:p><\/span><\/b><\/div>\n
\n(c) static, sliding, rolling<\/o:p><\/span><\/b><\/div>\n
\n(d) sliding, static, rolling<\/o:p><\/span><\/b><\/div>\n
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\nANSWER:-<\/span> (c) static, sliding, rolling<\/span><\/o:p><\/span><\/div>\n
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\n3)Alida runs her toy car on dry marble floor, wet marble floor,
\nnewspaper and towel spread on the floor. The force of friction acting on the
\ncar on different surfaces in increasing order will be<\/o:p><\/span><\/b><\/div>\n
\n(a) wet marble floor, dry marble floor, newspaper and towel.<\/o:p><\/span><\/b><\/div>\n
\n(b) newspaper, towel, dry marble floor, wet marble floor.<\/o:p><\/span><\/b><\/div>\n
\n(c) towel, newspaper, dry marble floor, wet marble floor<\/o:p><\/span><\/b><\/div>\n
\n(d) wet marble floor, dry marble floor, towel, newspaper<\/o:p><\/span><\/b><\/div>\n
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\nANSWER:-<\/span> (a) wet marble floor, dry marble floor, newspaper and towel.<\/span><\/o:p><\/span><\/div>\n
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