E L asked in Science & MathematicsPhysics · 3 months ago

May I please get some help?

A unicorn running on a beach at 8 m/s changes speed at a constant rate of 2.7 m/s2 over a period of 2 seconds. What is the unicorn's velocity at the end of this time?

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  • 3 months ago
    Favorite Answer

    The physics is simple.  The end speed = initial speed + increase in speed over time = U + aT = 8 + 2.7*2 = 13.4 m/s  ANS.

  • 3 months ago

    V_f = V_i + a*t

    V_f = 8 + 2.7*2

    V_f = 13.4m/s

  • oubaas
    Lv 7
    3 months ago

    final speed Vf = Vi+a*t = 8+2.7*2 = 13.4 m/sec 

    distance d = Vi*t+a/2*t^2 = 8*2+1.35*2^2 = 16+5.4 = 21.4 m 

  • 3 months ago

    never confuse speed and velocity.  Velocity can alter even when speed does not.   The SPEED of the unicorn would be either 8+2.7*2 = 13.4 m/s or 8 - 2.7 *2 = 2.6 m/s Depending on the direction of the change.  We cannot know what the change in the velocity is without more information.

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  • Anonymous
    3 months ago

    Trick question, Unicorns don't exist.

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