Question

At a construction site a pipe wrench struck the ground with a speed of 23 m/s. (a) From what height was it inadvertently dropped? (b)How long was it falling?

Answer 1

Answer:26.96 m,2.34 s

Explanation:

Given

Wrench hit the ground with a speed of 23 m/s

Applying equation of motion

$v^2-u^2=2as$

Here u=0 because it is dropped from a height of S m

$23^2-0=2\times 9.81\times s$

$s=\frac{529}{2\times 9.81}=26.96 m$

Time required by wrench to hit the ground

v=u+at

$23=9.81\times t$

$t=\frac{23}{9.81}=2.34 s$