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Title: Velocity of a ball and How long does it take Post by: mjcurry on Mar 12, 2016 If a ball is given a push so that it has an initial velocity of 4 m/s down a certain inclined plane, then the distance it has rolled after t seconds is given by the following equation.
s(t) = 4t + 5t2 (a) Find the velocity after 2 seconds. m/s (b) How long does it take for the velocity to reach 30 m/s? (Round your answer to two decimal places.) Title: Re: Velocity of a ball and How long does it take Post by: habiba on Mar 13, 2016 Velocity is just the derivative of s
v = s'(t) = 4 + 10t v(2) = 4 + 10(2) = 24 m/s 4 + 10t = 25 10t = 21 t = 2.1 s |