Question #6f91b

Question

Question #6f91b

2 Answers

Impact of this question

2194 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-07-01T15:46:24

I found the following values (in red in the explanation):
(but check carefully my math!!!)

Explanation:

Have a look:
enter image source here

Answer 2 · 2015-07-02T13:23:35

Have a look if it is clearer.

Explanation:

Using the same diagram.
Considering that:
$v_i=7.25 m/s$
$h_1+h_2=25m$
Use: $v_f-v_i=at$
$0=7.25-9.81t_1$
$t_1=0.74s$
Use:
$h_1=v_it_1+1/2at_1^2$
$h_1=7.25*0.74-1/289.81(0.74)^2$
$h_1=2.68m=2.7m$

$h_2=25-2.7=22.3m$
$h=h_2-h_1=19.6m$
to fall down:
$-h_2=-1/2*9.81t_2^2$
$t_2=2.13s$
into $v_f-v_i=at$ :
with $v_i=0$
$v_f=21m/s$
and
$T_(comp.te)=t_1+t_2=2.87s$

Science

Math

Humanities

... and beyond

Question #6f91b

2 Answers

Explanation:

Explanation:

Related questions

Impact of this question