At a construction site a pipe wrench struck the ground with a speed of 24m/s. (a) From what height was it inadvertently dropped? (b) How long was it falling?

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Answer 1 · 2015-12-07T22:55:40

#(a)#

#29.4"m"#

#(b)#

#2.45"s"#

#(a)#

#v^2=u^2+2as#

This becomes:

#24^2=0+2xx9.8xxs#

#:.s=(576)/(2xx9.8)=29.4"m"#

#(b)#

#s=1/2"g"t^2#

#:.t=sqrt((2s)/(g)#

#:.t=sqrt((2xx29.4)/(9.8))=2.45"s"#