{"id":528735,"date":"2023-04-21T01:14:42","date_gmt":"2023-04-20T19:44:42","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/three-blocks-a-b-and-c-of-masses-4-kg-2kg-and-1kg-respectively-are-in-contact-on-a-frictionless-surface-as-shown-if-a-force-of-14-n-is-applied-on-the-4kg-block-then-the-contact-force-be-2\/"},"modified":"2025-06-26T17:46:30","modified_gmt":"2025-06-26T12:16:30","slug":"three-blocks-a-b-and-c-of-masses-4-kg-2kg-and-1kg-respectively-are-in-contact-on-a-frictionless-surface-as-shown-if-a-force-of-14-n-is-applied-on-the-4kg-block-then-the-contact-force-be-2","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/physics\/three-blocks-a-b-and-c--of-masses-4-kg--2kg-and-1kg-respe\/","title":{"rendered":"Three blocks A, B and C , of masses 4 kg , 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact \u00a0force between A and B is"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Three blocks A, B and C , of masses 4 kg , 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact \u00a0force between A and B is","custom_permalink":"question\/physics\/three-blocks-a-b-and-c--of-masses-4-kg--2kg-and-1kg-respe\/"},"categories":[],"acf":{"question":"

Three blocks A, B and C , of masses 4 kg , 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact  force between A and B is
<\/p>","options":[{"option":"

2N<\/p>","correct":false},{"option":"

6N<\/p>","correct":true},{"option":"

8N<\/p>","correct":false},{"option":"

18N<\/p>","correct":false}],"solution":"

Here m1<\/sub>=3 kg, m2<\/sub>=2kg, m3<\/sub>=1 kg <\/p>

Acceleration of system
a<\/mi>=<\/mo>F<\/mi>m<\/mi>1<\/mn><\/msub>+<\/mo>m<\/mi>2<\/mn><\/msub>+<\/mo>m<\/mi>3<\/mn><\/msub><\/mrow><\/mfrac>=<\/mo>14<\/mn>4<\/mn>+<\/mo>2<\/mn>+<\/mo>1<\/mn><\/mrow><\/mfrac>=<\/mo>2<\/mn>ms<\/mi>\u2212<\/mo>2<\/mn><\/mrow><\/msup><\/math>
Contact force between A and B
=<\/mo>m<\/mi>2<\/mn><\/msub>+<\/mo>m<\/mi>3<\/mn><\/msub><\/mrow><\/mfenced>a<\/mi>=<\/mo>(<\/mo>2<\/mn>+<\/mo>1<\/mn>)<\/mo>\u00d7<\/mo>2<\/mn>=<\/mo>6<\/mn>N<\/mi><\/math><\/p>","subject":"Physics"},"yoast_head":"\nThree blocks A, B and C , of masses 4 kg , 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4kg block, then the contact \u00a0force between A and B is - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Three blocks A, B and C , of masses 4 kg , 2kg and 1kg respectively, are in contact on a frictionless surface, as shown. 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