A boat weighing 1380kg starts to move and for 9s develops a speed of 2m / s when moving in calm water.
| February 4, 2021 | education
A boat weighing 1380kg starts to move and for 9s develops a speed of 2m / s when moving in calm water. Determine the thrust force of the engine, considering it constant.
Initial data: m (boat weight) = 1380 kg; the boat started to move (V0 (initial speed of the boat) = 0 m / s); t (acceleration duration) = 9 s; V (the speed that the boat developed) = 2 m / s.
1) Determine the acceleration of the boat during acceleration: a = (V – V0) / t = V / t = 2/9 = 0.22 (2) m / s2.
2) The thrust of the boat engines: F = m * a = 1380 * 0.22 (2) = 306.7 N.
Answer: The thrust force of the boat’s engines is 306.7 N.
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