Chapter 2. Velocity, acceleration, and time for constant accelaration only (2-5)

Question

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{"title":"velocity","description":"Correct","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"4,18,38,66\"}]"} {"title":"velocity at time t","description":"Incorrect","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"104,17,140,59\"}]"} {"title":"constant acceleration","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"236,13,266,53\"}]"} {"title":"time at x","description":"Incorrect","type":"incorrect","color":"#000080","code":"[{\"shape\":\"rect\",\"coords\":\"286,19,287,47\"},{\"shape\":\"rect\",\"coords\":\"271,16,301,49\"}]"}

Question

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{"title":"velocity","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"4,18,38,66\"}]"} {"title":"velocity at time t","description":"Correct!","type":"correct","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"104,17,140,59\"}]"} {"title":"constant acceleration","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"236,13,266,53\"}]"} {"title":"time at x","description":"Incorrect","type":"incorrect","color":"#000080","code":"[{\"shape\":\"rect\",\"coords\":\"286,19,287,47\"},{\"shape\":\"rect\",\"coords\":\"271,16,301,49\"}]"}

Question

S7/Q1QaCQSy2+82BiwGelMraIX//fwunAXRj9PvG/wIcDGa0OJZb87WXugfsT31/AJnwf+RE2Q0=

{"title":"velocity","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"4,18,38,66\"}]"} {"title":"velocity at time t","description":"Incorrect","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"104,17,140,59\"}]"} {"title":"constant acceleration","description":"Correct!","type":"correct","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"236,13,266,53\"}]"} {"title":"time at x","description":"Incorrect","type":"incorrect","color":"#000080","code":"[{\"shape\":\"rect\",\"coords\":\"286,19,287,47\"},{\"shape\":\"rect\",\"coords\":\"271,16,301,49\"}]"}

Question

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{"title":"velocity","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"4,18,38,66\"}]"} {"title":"velocity at time t","description":"Incorrect","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"104,17,140,59\"}]"} {"title":"constant acceleration","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"236,13,266,53\"}]"} {"title":"time at x","description":"Correct!","type":"correct","color":"#000080","code":"[{\"shape\":\"rect\",\"coords\":\"286,19,287,47\"},{\"shape\":\"rect\",\"coords\":\"271,16,301,49\"}]"}

Review

This equation tells us how the object’s velocity \(v_x\) varies with time. If \(a_x=0\) so that the object is not accelerating, \(v_x\) at any time \(t\) is the same as the velocity \(v_{0x}\) at \(t = 0\): in \perpher words, the velocity is constant. If \(a_x\) is not zero and the object is accelerating, the term \(a_xt\) in this equation says that the velocity changes with time.