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4 marksMotions

CAPE Physics Unit 1 · May/June 2021 · Paper 2 · Question 1(d)(i)

A car of total mass 680 kg races around a circular track of diameter 200 m banked at 50° at a constant speed of 80 m s⁻¹. Figure 2 illustrates the forces.

Explain why the car is accelerating even though its speed remains constant.

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Other parts of this question

  1. 1(a)On the grid provided in Figure 1 on page 7, plot a graph of velocity versus time. Draw the best smooth curve through the points.[5 marks]
  2. 1(b)Describe the motion of the parachutist from jumping out of the airplane to landing, explaining what happens during each specified time interval: 0–20 s, 20–40…[8 marks]
  3. 1(c)Identify the two major forces acting on the parachutist during the intervals 20–40 s and 45–60 s, and state the relationship between these forces.[2 marks]
  4. 1(d)(ii)Calculate the centripetal acceleration of the car.[3 marks]
  5. 1(d)(iii)Calculate the normal reaction force acting on the car.[2 marks]
  6. 1(e)(i)Define the term 'geostationary satellite'.[2 marks]
  7. 1(e)(ii)State the physical characteristics of the Earth that determine the fixed orbital radius, r, for a geostationary satellite.[2 marks]
  8. 1(e)(iii)State two applications of geostationary satellites.[2 marks]

More practice: the rest of this paper · more Motions questions · all CAPE Physics Unit 1 past papers