Question #7a369 Physics 1D Motion Falling Objects 1 Answer Michael Aug 9, 2015 #(a). 2000"m"# #(b). 6"s"# Explanation: The depth of the well is given by : #s=1/2"g"t^2# #=1/2xx10xx20^2# #=2000"m"# For the echo: #t="dist/speed"=2000/330=6"s"# Answer link Related questions Question #50365 Question #d6555 What is the definition of free fall? Question #d655d Question #f7a6f An archer shoots an arrow with an initial velocity of 21 m/s straight up from his bow. He... What is the percent difference between the acceleration due to gravity at sea level and at the... What height will a dart achieve 7 seconds after being blown straight up at 50 m/s? How long does a ball take to reach the ground 7 m below, if it is thrown straight up with an... How long does a ball take to fall from a roof to the ground 7 m below? See all questions in Falling Objects Impact of this question 2163 views around the world You can reuse this answer Creative Commons License