The diagram shows the velocity-time graph of a particle P moving in a straight line with velocity v ms⁻¹ at time t s after leaving a fixed point. [Figure P shows a velocity-time graph] Find the distance travelled by the particle P.
- (a)The diagram shows the velocity-time graph of a particle P moving in a straight line with velocity v ms⁻¹ at time t s after leaving a fixed point. [Figure P shows a velocity-time graph] Find the distance travelled by the particle P.[2]
- (b)The diagram shows the displacement-time graph of a particle Q moving in a straight line with displacement s m from a fixed point at time t s. [Figure Q shows a displacement-time graph] On the axes below, plot the corresponding velocity-time graph for the particle Q.[3]
- (c)The displacement s m of a particle R, which is moving in a straight line, from a fixed point at time t s is given by s = 4t - 16ln(t+1) + 13.
- (c)(i)Find the value of t for which the particle R is instantaneously at rest.[3]
- (c)(ii)Find the value of t for which the acceleration of the particle R is 0.25ms⁻².[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2014). The mark or mark type is shown in brackets.
- [M1] M1 for realising that area represents distance travelled and attempt to find area
- [A1] A1
- [B1] B1 for velocity of 2 ms⁻¹ for 0 ≤ t ≤ 6
- [B1] B1 for velocity of zero for their '6' to their '25'
- [B1] B1 for velocity of 1 ms⁻¹ for 25 ≤ t ≤ 30
- [M1] M1 for attempt at differentiation
- [DM1] DM1 for equating velocity to zero and attempt to solve
- [A1] A1
- [M1] M1 for attempt at differentiation and equating to 0.25 with attempt to solve
- [A1] A1
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