A-LevelMathematicsMechanics9709/52 · May/June 2019 · Q35 Marks
A particle P of mass 0.4 kg is attached to a fixed point A by a light inextensible string of length 0.5 m. The point A is 0.3 m above a smooth horizontal surface. The particle P moves in a horizontal circle on the surface with constant angular speed 5 rad s⁻¹.
- (i)Calculate the tension in the string.[3]
- (ii)Find the magnitude of the force exerted by the surface on P.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [B1] Use Pythagoras's theorem
- [M1] Use Newton's Second Law
- [A1]
- [M1] Resolve vertically. Allow for their T for M1
- [A1]
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