A-LevelMathematicsMechanicsOct/Nov 2018Paper 4 Q14 Marks
A particle of mass 0.2 kg moving in a straight line experiences a constant resistance force of 1.5 N. When the particle is moving at speed 2.5 m s⁻¹, a constant force of magnitude F N is applied to it in the direction in which it is moving. Given that the speed of the particle 5 seconds later is 4.5 m s⁻¹, find the value of F.
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