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3 marksPotential Energy, Ep

CSEC Physics · January 2015 · Paper 2 · Question 2(b)(i)

A bucket filled with cement of total mass 60 kg is raised vertically 150 m from the ground to the twelfth floor of a building under construction as shown in Figure 1.

Calculate the amount of energy that was needed to perform this activity. (Assume no frictional forces were present.) (Gravitational field strength, g = 10 N kg⁻¹)

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Other parts of this question

  1. 2(a)(i)Complete Table 2 to show two other major forms of energy and ONE example of each.[4 marks]
  2. 2(a)(ii)State the SI unit of energy.[1 mark]
  3. 2(a)(iii)Define the SI unit of energy named in (ii) above.[2 marks]
  4. 2(b)(ii)If this activity takes 25 seconds to complete, calculate the power utilized in kilowatts.[4 marks]
  5. 2(b)(iii)If friction was present, what effect if any, would this have on the power needed?[1 mark]

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