Physics, 17.10.2019 18:30 arianawelsh123l
Which of the following statements is/are true? check all that apply. a nonconservative force permits a two-way conversion between kinetic and potential energies. a conservative force permits a two-way conversion between kinetic and potential energies. the work done by a nonconservative force depends on the path taken. a potential energy function can be specified for a conservative force. a potential energy function can be specified for a nonconservative force. the work done by a conservative force depends on the path taken.
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Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
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Which of the following statements is/are true? check all that apply. a nonconservative force permit...
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