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Qa) 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

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?

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#1ValoyAnswered at 2013-03-04 22:17:42
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
#2ajAnswered at 2013-03-04 22:19:22
*While painting on a 12 meter high roof,
#3AnsiAnswered at 2013-03-04 22:20:46
t= 1.565 s - correct
v =g•t =9.8•1.565 = 15.3 m/s
#4TatiyannaAnswered at 2013-03-04 22:21:24
Velocity
12/1.6 sec= 7.5 meters/sec down
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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

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