A-LevelMathematicsMechanics9709/41 · Oct/Nov 2018 · 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.
- (a)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.[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [M1] For use of v = u + at
- [A1] a = 0.4
- [M1] For use of Newton's second law
- [A1] F = 1.58
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