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Why is a modified vehicle with its body raised higher or less stable than a similar vehicle with its body at a normal weight?
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- Many years ago, automobiles were manufactured to be as rigid as possible, whereas today’s autos are designed to crumple upon impact. Why?A passenger car with a 2.5-m wheelbase has 52% of its weight on the front wheels on level ground, as illustrated below. Where is the CM of this car located with respect to the rear axle?When two unequal masses are balanced on either side of the (balanced) meter stick, what is the relationship between the ratios of the masses and the ratios of their lever arms?
- The center of mass of a rigid body always lies inside the body. Is this statement true or false? Why?When a catcher in a baseball game catches a fast ball, he does not hold his arms rigid, but relaxes them so that the mitt moves several inches while the ball is being caught. Why is this important?Consider the following mass distribution where the x- and y-coordinates are given in meters: 5.0 kg at (0.0, 0.0) m, 2.9 kg at (0.0, 4.8) m, and 4.0 kg at (3.5, O.0) m. Where should a fourth object of 7.1 kg be placed so that the center of gravity of the four-object arrangement will be at (0.0, 0.0) m? X = y = m
- When you carry a heavy load with one arm, why do you tend to hold your free arm away from your body?You are on a teeter-totter with a young girl. Your mass is 105 kg and the girl's mass is 25 kg. The child sits as far as possible from the middle at 5 m. Where must you sit to exactly balance her weight?An 85-kg basketball player does a series of push-ups to strengthen his arm and chest muscles. If both feet and exert the same force and both palms do, likewise, determine the force that the floor exerts of on each of his feet and on each hand. Assume that his center of mass is 0.920 m from the top of his head.
- To strengthen his arm and chest muscles, a 79-kg athlete 2.0 m tall is doing a series of push-ups as shown in the figure below (Figure 1). His center of mass is 1.20 m from the bottom of his feet, and the centers of his palms are 30.0 cm from the top of his head. Figure 1 of 1 > 20m -300 Review Find the force that the floor exerts on each of his feet, assuming that both feet exert the same force. Express your answerin newtons. 16] ΑΣΦ ? F-125.24 Submit Previous Answers Request Answer * Incorrect; Try Again; 4 attempts remaining Part B Find the force that the floor exerts on each of his hands, assuming both palms exert the same force. Express your answer in newtons. LIVE ΑΣΦΑ F-114 N Submit Previous Answers Request Answer * Incorrect; Try Again; 5 attempts remaining P Pearson NAll rigid bodies are .. elastic O partially O Fully non O none of the aboveIn order to get his car out of the mud, a man ties one end of a rope to the front bumper and the other end to a tree 15 m away, as shown below. He then pulls on the center of the rope with a force of 400 N, which causes its center to be displaced 0.30 m, as shown. What is the force of the rope on the car?