| Exam Board | OCR MEI |
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| Module | AS Paper 1 (AS Paper 1) |
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| Year | 2021 |
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| Session | November |
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| Topic | Newton's laws and connected particles |
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3 Forces \(\mathbf { F } _ { 1 } = ( 2 \mathbf { i } + 9 \mathbf { j } ) \mathbf { N }\) and \(\mathbf { F } _ { 2 } = ( - \mathbf { i } + \mathbf { j } ) \mathbf { N }\) act on a particle. A third force \(\mathbf { F } _ { 3 }\) acts so that the particle is in equilibrium under the action of the three forces.
Find the force \(\mathbf { F } _ { 3 }\).