A worker lifts a weight w by pulling down on a rope with a S force F. The upper pulley is attached to the ceiling by a chain, and the lower pulley is at- tached to the weight by another chain. Draw one or more free-body diagrams to find the tension in each chain and the magnitude of S F, in terms of w, if the weight is lifted at constant speed. Assume that the rope, pul- leys, and chains have negligible weights.
Answers: 3
Another question on Physics
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 22.06.2019 17:30
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.
Answers: 1
Physics, 22.06.2019 22:20
A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.
Answers: 1
Physics, 23.06.2019 00:30
What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr
Answers: 2
You know the right answer?
A worker lifts a weight w by pulling down on a rope with a S force F. The upper pulley is attached t...
Questions
History, 11.03.2021 21:20
Biology, 11.03.2021 21:20
Mathematics, 11.03.2021 21:20
English, 11.03.2021 21:20
Mathematics, 11.03.2021 21:20
Computers and Technology, 11.03.2021 21:20
