Explanation Given information: The weight of the sailboat ( W ) is 980 lb . The downwind speed ( v 1 ) is 8 mi / h . The speed to reach the boat at the 10 second interval ( v 2 ) is 12 mi / h . The time interval ( t ) is 10 sec . The acceleration due to gravity ( g ) is 32.2 ft / s 2 . Calculation: Calculate the mass of the sailboat ( m ) using the relation: W = m g m = W g Substitute 980 lb for W and 32.2 ft / s 2 for g . m = 980 32.2 = 30.435 lb ⋅ ft / s 2 Convert the unit of downwind speed ( v 1 ) from mi / hr to ft / s : v 1 = ( v 1 ) mi / hr × ( 5280 ft 1 mi ) × ( 1 hr 3600 sec ) Here, ( v 1 ) mi / hr is the downwind speed in mi / hr . Substitute 8 mi / h for v 1 . v 1 = 8 × ( 5280 ft 1 mi ) × ( 1 hr 3600 sec ) = 11.73 ft / s Convert the unit of speed to reach the sailboat ( v 2 ) from mi / hr to ft / s : v 2 = ( v 2 ) mi / hr × ( 5280 ft 1 mi ) × ( 1 hr 3600 sec ) Here, ( v 2 ) mi / hr is speed to reach the sailboat in mi / hr

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ISBN: 9781259633133

Author: BEER

Publisher: MCG

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Chapter 13.3, Problem 13.121P

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Find the net force provided by the spinnaker (Fn).

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Chapter 13.3, Problem 13.120P

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Find the net force provided by the spinnaker ( F n ) .

Solution Summary: The author calculates the net force provided by the spinnaker (F_n).

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