6. Intro to Forces (Dynamics)
Forces in Connected Systems of Objects
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- Multiple ChoiceThe three ropes shown in the figure are tied to a steel ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown. If the tension in rope 2 is , what is the mass of the steel ring?554views
- Multiple ChoiceThree blocks are placed in line on a frictionless table with block B in between blocks A and C. Block A has a mass of , block B has a mass of , and block C has a mass of . A student pushes horizontally on block A with a force of . What is the magnitude of the force of block B on block C?1091views1comments
- Multiple ChoiceThe coefficient of kinetic friction for block A in the figure is 0.2 and the pulley is frictionless. If the mass of block A is , what is the magnitude of its acceleration?932views
- Multiple ChoiceA toy train consists of an engine, followed by a boxcar, followed by a caboose. All have mass m. When the engine's wheels provide a force F in the forward direction, the train has acceleration a. What is the magnitude of the force of the boxcar on the caboose? Ignore any frictional effects.459views
- Textbook Question
(II) A 75-kg petty thief wants to escape from a third-story jail window. Unfortunately, a makeshift rope made of sheets tied together can support a mass of only 62 kg. How might the thief use this 'rope' to escape? Give a quantitative answer.
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(II) A window washer pulls herself upward using the bucket–pulley apparatus shown in Fig. 4–40.
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(b) If she increases this force by 15%, what will her acceleration be? The mass of the person plus the bucket is 78 kg.
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(II) One 3.2-kg paint bucket is hanging by a massless cord from another 3.2-kg paint bucket, also hanging by a massless cord, as shown in Fig. 4–41.
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(a) If the buckets are at rest, what is the tension in each cord?
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III) Determine a formula for the magnitude of the force F → exerted on the large block () in Fig. 4–56 so that the mass m_A does not move relative to m_C. Ignore all friction. Assume m_B does not make contact with m_C . <IMAGE>
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