A pillow is thrown downward with an initial speed of 6 m/s. After 4 seconds, the pillow’s velocity is m/s. (g= -9.8m/s2)

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A pillow is thrown downward with an initial speed of 6 m/s.
After 4 seconds, the pillow’s velocity is m/s. (g= -9.8m/s2)

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  1. Given :

    Initial velocity, u = -6 m/s.

    Time taken, t = 4 seconds.

    Acceleration due to gravity, [tex]g = -9.8\ m/s^2[/tex].( Here negative sign means downward direction )

    To Find :

    Velocity after 4 seconds.

    Solution :

    By equation of motion.

    v = u + at

    Here , a = g.

    v = u + gt

    v = -6 + (-9.8)×4

    v = -6 + (-39.2)

    v = -45.2 m/s

    Therefore, velocity after 4 seconds is -45.2 m/s.

    Hence, this is the required solution.

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