Posted by **Anonymous** on Thursday, May 31, 2012 at 11:53am.

a) While painting a 12 meter high roof you knock the paint brush off the edge, with no air resistance on the brush how long will it take to hit the ground?

b) What would the velocity of the brush be before it hit the ground?

- Physics -
**Anonymous**, Thursday, May 31, 2012 at 11:56am
*While painting on a 12 meter high roof,

- Physics -
**Anonymous**, Thursday, May 31, 2012 at 1:18pm
Please check

12m= (0m/s)+1/2(9.81m/s^2)(t^2)

12m= 0+(4.905m/s^2)(t^2)

t^2=12/4.905m/s^2

t^2= 2.45s^2

t= 1.565 s

t= 1.6 s

- Physics -
**Anonymous**, Thursday, May 31, 2012 at 1:21pm
Velocity

12/1.6 sec= 7.5 meters/sec down

- Physics -
**Elena**, Thursday, May 31, 2012 at 5:50pm
t= 1.565 s - correct

v =g•t =9.8•1.565 = 15.3 m/s

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