Friction arises from shearing these “welded” junctions and from the action of the irregularities of the harder surface plowing across the softer surface. { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, },{ The internal losses in the two substances are similar to those that keep a ball from bouncing back to the level from which it is dropped. { bidder: 'sovrn', params: { tagid: '705055' }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot2' }}]}]; { bidder: 'ix', params: { siteId: '195466', size: [728, 90] }}, {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_HDX' }}, "sign-in": "https://dictionary.cambridge.org/us/auth/signin?rid=READER_ID", { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_leftslot' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, { bidder: 'sovrn', params: { tagid: '446382' }}, 'pa pdd chac-sb tc-bd bw hbr-20 hbss lpt-25' : 'hdn'">. bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776160', position: 'atf' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, { bidder: 'sovrn', params: { tagid: '346698' }}, {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, } { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}, Add the power of Cambridge Dictionary to your website using our free search box widgets. "sign-up": "https://dictionary.cambridge.org/us/auth/signup?rid=READER_ID", Sign in. Static friction, in contrast, acts between surfaces at rest with respect to each other. Friction, force that resists the sliding or rolling of one solid object over another. if(success && (tcData.eventStatus === 'useractioncomplete' || tcData.eventStatus === 'tcloaded')) { name: "unifiedId", "noPingback": true, The value of the coefficient of friction for a case of one or more bricks sliding on a clean wooden table is about 0.5, which implies that a force equal to half the weight of the bricks is required just to overcome friction in keeping the bricks moving along at a constant speed. { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, { bidder: 'sovrn', params: { tagid: '387232' }}, This article was most recently revised and updated by, https://www.britannica.com/science/friction, friction - Children's Encyclopedia (Ages 8-11), friction - Student Encyclopedia (Ages 11 and up). Get exclusive access to content from our 1768 First Edition with your subscription. { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, Browse our dictionary apps today and ensure you are never again lost for words. { { bidder: 'sovrn', params: { tagid: '705055' }}, googletag.pubads().setTargeting("cdo_dc", "english");