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PhysicsQ&A Libraryas & Exercisesa eSearch this bookFigure 4.33 A baby is weighed usinga spring scale.4.6 Problem-Solving Strategies23. A 5.00 x 10°-kg rocket is accelerating straight up. Its engines produce 1.250 x 10' N of thrust, and air resistance is4.50 x 10 N. What is the rocket's acceleration? Explicitly show how you follow the steps in the Problem-Solving Strategy forNewton's laws of motion.24. The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If2what is the mass of the carthe force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/splus its occupants? Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton's laws of motion. Forthis situation, draw a free-body diagram and write the net force equation.25. Calculate the force a 70.0-kg high jumper must exert on the ground to produce an upward acceleration 4.00 times theacceleration due to gravity. Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton's laws ofmotion.26. When landing after a spectacular somersault, a 40.0-kg gymnast decelerates by pushing straight down on the mat.Calculate the force she must exert if her deceleration is 7.00 times the acceleration due to gravity. Explicitly show how youfollow the steps in the Problem-Solving Strategy for Newton's laws of motion.27 A freight train consists of two 8.00 x 101-kg engines and 45 cars with average masses of 5.50 x 10" kg. (a) What forcemust each encine exert backward on the track to accelerate the train at a rate of 5.00 x 10 m/sf if the force of frictionis2phy-2053---gener..pdfPOFQuestion

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