Physics

Physics, 30.08.2019 10:30, gungamer720

Which quantity is a vector?
(1)power
(2)kinetic energy
(3)speed
(4)weight

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Physics, 07.07.2019 04:30, finldani4

Which statement best compares momentum and kinetic energy? a. both momentum and kinetic energy are vector quantities. b. momentum is a vector quantity and kinetic energy is a scalar quantity. c. kinetic energy is a vector quantity and momentum is a scalar quantity. d. both momentum and kinetic energy are scalar quantities.

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Chemistry, 07.07.2019 16:30, debbys1802

Examine the information. a runner travels 10 m/s forward for 10 seconds. which of the quantities in the sentence would be considered a vector quantity, and why? the quantity 10 m/s is the only vector quantity because it is a measurement of speed. the quantity 10 s is the only vector quantity because it measures time. the quantity 10 m/s is the only vector quantity because it is a measurement that includes a direction. the quantities 10 m/s and 10 s are vector quantities because these numbers are both measurements that do not include direction.

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Physics, 07.11.2019 20:31, PinkDivaGirl02

Consider a system consisting of three particles: m1 = 4 kg, vector v1 = < 10, -5, 15 > m/s m2 = 9 kg, vector v2 = < -15, 5, -3 > m/s m3 = 3 kg, vector v3 = < -24, 36, 18 > m/s (a) what is the total momentum of this system? vector ptot = incorrect: your answer is incorrect. kg · m/s (b) what is the velocity of the center of mass of this system? vector vcm = m/s (c) what is the total kinetic energy of this system? ktot = j (d) what is the translational kinetic energy of this system? ktrans = j (e) what is the kinetic energy of this system relative to the center of mass? krel = j one way to calculate krel is to calculate the velocity of each particle relative to the center of mass, by subtracting the center-of-mass velocity from the particle's actual velocity to get the particle's velocity relative to the center of mass, then calculating the corresponding kinetic energy, then adding up the three relative kinetic energies. however, there is a much simpler way to determine the specified quantity, without having to do all those calculations; think about what you know about the relationships among the various kinds of kinetic energy in a multiparticle system. (if you wish, you can check your result by doing the complicated calculation just described.)

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Which quantity is a vector?
(1)power
(2)kinetic energy
(3)speed
(4)weight...

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