# Energy and Work Done – Question 1

The miners working in a salt mine use smooth wooden slides to move quickly from one level to another.

(a) A miner of mass 90 kg travels down the slide.

Calculate the change in gravitational potential energy of the miner when he moves 15 m vertically downwards.

gravitational field strength = 10 N/kg

Use the correct equation from the Physics Equations Sheet.

Change in gravitational potential energy = .................................. J
(2 marks)

(b) Calculate the maximum possible speed that the miner could reach at the bottom of the slide.

Use the correct equation from the Physics Equations Sheet.

Maximum possible speed = .............................................. m/s
(3 marks)

(c) The speed of the miner at the bottom of the slide is much less than the calculated maximum possible speed.

Explain why.

(3 marks)

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From Q4 P2 AQA June 2012 (Higher)

Energy and Work Done – Question 1 was last modified: October 29th, 2015 by