Fig. 7.1 shows a toy helicopter. It can hover and travel through the air. A student flies the toy helicopter on a journey from A to B to C to D at a constant height. Fig. 7.2 is a scale drawing of the path of the helicopter, viewed from above.[Figure 7.1][Figure 7.2 (to scale)]

1. (a)(i)Determine the total distance travelled by the toy helicopter.[1]
2. (a)(ii)The toy helicopter makes the journey in 40 s. Calculate its average speed during the journey.[2]
3. (b)(i)State the difference between distance and displacement.[1]
4. (b)(ii)Determine the scale used to construct Fig. 7.2 and complete the sentence. 1 cm on the diagram represents ........................................ on the path.[1]
5. (b)(iii)Using Fig. 7.2, determine the size of the displacement of point D from point A. Show your working.[2]
6. (b)(iv)Determine the angle between North and the direction of the displacement of point D from point A.[1]
7. (b)(v)State what is meant by velocity.[1]
8. (b)(vi)Another toy helicopter flies directly from point A to point D in 40 s. Explain why the magnitude of the velocity of this toy helicopter is smaller than the answer in (a)(ii).[1]
9. (c)When the toy helicopter hovers at D, its motor fails and it falls. It reaches terminal velocity as it falls. Explain, in terms of the forces and acceleration, what happens as the helicopter falls and reaches terminal velocity.[5]

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