A boat moves through the water with two forces acting on it. One is a 1,500-N forward push by the water on the propeller, and the other is a 1,100-N resistive force due to the water around the bow. (a) What is the acceleration of the 1,100-kg boat? 2.36 m/s 2 (b) If it starts from rest, how far will the boat move in 17.5 s? m (c) What will its velocity be at the end of that time? m/s Need Help? Read It
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- When two horizontal forces are exerted on the car, 250 N forward and 220 N backward, the car undergoes acceleration. What additional force is needed to produce non-accelerated motion.Commercial airplanes are sometimes pulled out of the passenger loading area by a tractor. a) An 1800 kg tractor exerts a force of 1.75 × 104 N backward on the pavement, and the system experiences forces resisting motion that totals 2400 N. If the acceleration is 0.14 m/s2, what is the mass of the airplane in kilograms? b)Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 93.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (c) Calculate the acceleration. m/s2 (d) What would the acceleration be if friction is 18.0 N?
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