# ( SAMPOERNA ACADEMY ) physics EXAMINATION

Jun 17th, 2015
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1. A diesel engine is used to drag a boat up a slipway (see Fig. 4.1). The boat finishes in the position shown by the broken outline. (a) On Fig. 4.1, carefully mark (i) the weight W of the boat, using an arrow labelled W, [1] (ii) the friction force F on the boat, using an arrow labelled F. [1]

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HOLIDAY TASK Date: July 2011Name:Class:Instructions:Answer the questions in YOUR BOOK.Write in dark or blue pen. Use pencil for any labeled diagram or graph.Submitted after Holiday.1. A diesel engine is used to drag a boat up a slipway (see Fig. 4.1).Fig. 4.1The boat finishes in the position shown by the broken outline.(a) On Fig. 4.1, carefully mark(i) the weight W of the boat, using an arrow labelled W, [1](ii) the friction force F on the boat, using an arrow labelled F. [1](b) State, in terms of W, F, h and s, how you could calculate(i) the work done lifting the weight of the boat,..................................................................................................................................................................................................................................... [1](ii) the work done against the friction force,............................................................................................................................................................................................................................................................. [1](iii) the total work done pulling the boat up the slipway............................................................................................................................. [1](c) What other measurement would you need to make if you wanted to calculate the useful power output of the diesel engine?...................

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