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GR0877 Problem 2

PROBLEM STATEMENT: This problem is still being typed .

SOLUTION: (D) If we ignore friction, horizontal and vertical motions of the object are independent. Therefore, no one really needs the initial horizontal component of the velocity to determine how much it takes to cover some distance in the vertical direction. The initial vertical component of the velocity is zero, so from H = gt^2/2 one gets H = (9.8 \cdot 2^2 )/2 = 9.8 \cdot 2 = 19.6 (m).

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  1. DH
    13.04.2016 at 19:03

    One can think of this intuitively which may be faster than remembering and using the equation. From freshman physics lab you know that it take just less than half a second for an object to hit the ground from a height of one meter. You can expect the distance covered by the dropped object to double for each additional half second in free fall so y = 1m + 2m + 4m + 8m + a little more > 15m which is close to 19m .

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