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bboycs
Aug18-09, 08:51 AM
A 5 kg vase is lifted vertically from rest to a distance of 10 m with a constant upward applied force of 60.0 N. Calculate

iii) the final speed of the vase

F=ma
60=5(a)
a=12

v^2 = U^2+2as
v^2=0+2(12)(10)
V^2 = 240
v= 15.49m/s

is the step correct~??

thanks for reply~

method_man
Aug18-09, 09:18 AM
F=ma
60=5(a)
a=12What about mg?

bboycs
Aug18-09, 09:21 AM
is that have to include mg??

method_man
Aug18-09, 09:47 AM
is that have to include mg??Yes. You have three forces acting on a vase: F, mg & ma.

bboycs
Aug18-09, 09:59 AM
Yes. You have three forces acting on a vase: F, mg & ma.

then can you show me the step to get the final speed??