A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 17° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.5 m/s. The force of the rope does 950 J of work on the skier as the skier moves a distance of 6.6 m up the incline. (a) If the rope moved with a constant speed of 2.2 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 6.6 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.5 m/s and (c) 2.2 m/s?
Answers: 1
Physics, 22.06.2019 23:30, queenbroookk
Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.
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Physics, 22.06.2019 23:30, melanyrivera776
Which model displays the change in a gas when the temperature of the gaseous system decreases?
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Physics, 23.06.2019 10:30, insomniacnana2
Auniform bridge, 20 m long and weighing 40000 n is supported by two pillars located 3.0 m from each end. if a 19600 n car is parked 8.0 m from one end of the bridge, how much force does each pillar exert?
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A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 17° with the hori...
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