Physics, 13.07.2019 04:00 neftalirojas14
An inventive child named nick wants to reach an apple in a tree without climbing the tree. sitting in a chair connected to a rope that passes over a frictionless pulley (fig. p5.81), nick pulls on the loose end of the rope with such a force that the spring scale reads 250 n. nick's true weight is 320 n, and the chair weighs 160 n. nick’s feet are not touching the ground. (a) draw a pair of diagrams showing the forces for nick and the chair considered as separate systems and another diagram for nick and the chair considered as one system. (b) show that the acceleration of the system is upward and find its magnitude. (c) find the force nick exerts on the chair.
Answers: 1
Physics, 21.06.2019 19:40
You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j
Answers: 2
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Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)
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The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information
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Physics, 22.06.2019 07:30
The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface
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An inventive child named nick wants to reach an apple in a tree without climbing the tree. sitting i...
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