Ask Question
5 September, 21:45

At a construction site a pipe wrench struck the ground with a speed of 31 m/s. (a) From what height was it inadvertently dropped? (b) How long was it falling?

+1
Answers (2)
  1. 5 September, 22:43
    0
    h = 48.05m

    h = 48.05mt = 3.1 sec

    Explanation:

    v = 31 m/s

    h = ?

    Ek = Ep

    0.5 mv² = mgh

    h = v²/2g

    h = 31² / (2*10)

    h = 961/20

    h = 48.05m

    (b) h = 1/2 gt²

    t = √2h/g

    t = √ (2*48.05) / 10

    t = 3.1 sec
  2. 5 September, 22:58
    0
    Much easier if you work the questions in the reverse order.

    b). Time = v/g

    31m/s / 10m/s^2 = 3.1 seconds

    a). Average speed during the fall = (1/2) (0+31m/s) = 15.5 m/s

    Distance = (average speed) (time)

    (15.5 m/s) (3.1 sec) = 48.05 meters
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “At a construction site a pipe wrench struck the ground with a speed of 31 m/s. (a) From what height was it inadvertently dropped? (b) How ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers