Simple Work and Energy question

[pinkerpikachu]

A) the force required to give a helicopter of a mass M an acceleration of .10g upward.
B) Find the work done by this force as the helicopter moves a distance of h upward

I'm not incompetent or totally clueless about this.I know that F=ma and W=Fx

So, my solutions:

a) F=ma
F= .10Mg

b) W=Fx
W=.10Mgh


But the answer in the back of my book has a) 1.10Mg B) 1.10Mgh so either I'm missing some crucial step, or my book has a typo

help please?

 

[LowlyPion]

A) the force required to give a helicopter of a mass M an acceleration of .10g upward.
B) Find the work done by this force as the helicopter moves a distance of h upward

I'm not incompetent or totally clueless about this.I know that F=ma and W=Fx

So, my solutions:

a) F=ma
F= .10Mg

b) W=Fx
W=.10Mgh


But the answer in the back of my book has a) 1.10Mg B) 1.10Mgh so either I'm missing some crucial step, or my book has a typo

help please?

Unfortunately you forgot that the Helicopter has a weight of m*g.
To accelerate it another .1g means that it must overcome the original m*g and then add the extra .1*m*g.