du 8:05 PM @ 45% edugen.Wileypus.com WileyPLUS af Physlics, 10 HW.4.Pty.1Chapter

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du 8:05 PM @ 45% edugen.Wileypus.com WileyPLUS af Physlics, 10 HW.4.Pty.1Chapter 04, Problem 016 hete t4 r The velocity of a particle moving in the xy plane is given by .tsst . 42ra)-as, . with ·inmeters per second and t(>0). -5.51-42+85 Mate Mhtm seconds. At t = 1.6 s and in unit-vector notation, what are (a) the x Component and (b) the y component of the acceleration? (c) When (if hapte t4 ioever) is the acceleration zero? (d) At what positive time does the speed equal 10 m/s? 4 Nuber coessing ths Question pints based on

Explanation / Answer

A) acceleration ax = dVx/dt

= 5.5 - 2*4.2t

= 5.5 - 2*4.2*1.6

= - 7.94 m/s^2 Answer

B) ay = dVy/dt = 0 m/s^2 Answer

C) 5.5 - 2*4.2t = 0

t = 5.5/(2*4.2) = 0.655 s answer

D) 5.5t - 4.2 t^2 = 10 and 5.5t - 4.2t^2 = - 10

Solving both equations, we have only one positive solution

t = 2.33 s answer

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