{"id":5938,"date":"2016-12-17T20:57:29","date_gmt":"2016-12-17T20:57:29","guid":{"rendered":"http:\/\/www.mrsphysics.co.uk\/higher\/?p=395"},"modified":"2025-11-25T07:38:24","modified_gmt":"2025-11-25T07:38:24","slug":"new-secret-sign-of-the-physicist","status":"publish","type":"post","link":"https:\/\/mrsphysics.co.uk\/index.php\/2016\/12\/17\/new-secret-sign-of-the-physicist\/","title":{"rendered":"New Secret Sign of the Physicist"},"content":{"rendered":"<p>For years I&#8217;ve struggled with the best way to teach force on a moving particle in a field. Tom Balanowski first introduced me to the &#8220;slap&#8221; method and this year with the help of the 2016-2017 Higher Physics Group we have got it sorted!<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-396\" src=\"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/slap-rule-300x253.png\" alt=\"slap-rule\" width=\"300\" height=\"253\" \/><\/p>\n<p>Use the Left-hand Slap Rule where the four fingers of the left point in the direction of the magnetic field B and the thumb points in the direction of the moving charge or current, the direction of slapping would be the direction of force F on the conductor.<\/p>\n<p>So how to deal with positive and negative charges. We decided that this method can be used for both. If the charge is negative the slap is the way the palm points. If the charges are positive then use the back of the hand, which is far more <span style=\"color: #ff0000;\">P<\/span>ainful<\/p>\n<p><strong><span style=\"color: #ff0000;\">P<\/span>ain = <span style=\"color: #ff0000;\">P<span style=\"color: #1a1a1a;\">ositive<\/span><\/span><\/strong><\/p>\n<p>Thanks to Amy for these! Note the arrow for the force, should really be coming out of the hand or the way the slap goes; Amy drew this on her hand before I had told her about the \u00d7 and \u2022 -kinaesthetic learner!<\/p>\n<p><span style=\"color: #ff00ff;\">\u00a0<\/span><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-404\" src=\"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip-300x267.png\" alt=\"Secret sign1\" width=\"300\" height=\"267\" srcset=\"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip-300x267.png 300w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip-10x10.png 10w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip-90x80.png 90w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip-600x534.png 600w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-snip.png 693w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-405\" src=\"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-2-snip-300x226.png\" alt=\"secret back hand\" width=\"300\" height=\"226\" srcset=\"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-2-snip-300x226.png 300w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-2-snip-10x8.png 10w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-2-snip-600x451.png 600w, https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2016\/12\/Amy-2-snip.png 726w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/s.gravatar.com\/avatar\/e1515b0c027eaeaaa7232dae92981146?s=80\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-172\" src=\"http:\/\/www.mrsphysics.co.uk\/bge\/wp-content\/uploads\/2016\/06\/Signature-300x54.png\" alt=\"Signature\" width=\"127\" height=\"23\" \/><\/p>\n<hr style=\"line-height: 1.75;\" \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For years I&#8217;ve struggled with the best way to teach force on a moving particle in a field. Tom Balanowski first introduced me to the &#8220;slap&#8221; method and this year with the help of the 2016-2017 Higher Physics Group we have got it sorted! Use the Left-hand Slap Rule where the four fingers of the&#8230;<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[617],"tags":[],"ppma_author":[1267],"class_list":["post-5938","post","type-post","status-publish","format-standard","hentry","category-particlesandwaves","vs-blog blog-single wow fadeInUp"],"acf":[],"authors":[{"term_id":1267,"user_id":3,"is_guest":0,"slug":"n5","display_name":"Mrs Physics","avatar_url":"https:\/\/mrsphysics.co.uk\/wp-content\/uploads\/2025\/12\/OK-scaled.png","author_category":"","first_name":"Mrs","last_name":"Physics","user_url":"","job_title":"","description":""}],"_links":{"self":[{"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/5938","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=5938"}],"version-history":[{"count":1,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/5938\/revisions"}],"predecessor-version":[{"id":8434,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/5938\/revisions\/8434"}],"wp:attachment":[{"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=5938"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/categories?post=5938"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/tags?post=5938"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/mrsphysics.co.uk\/index.php\/wp-json\/wp\/v2\/ppma_author?post=5938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}