The first part of the question uses the formula for finding work done, which is
#W=F*d#, where #W# is work done in joules, #F# is the force used in newtons, and #d# is the displacement in metres. Looking at our question, we see that #W=185000# and #d=285#. Plug these value into the formula, and we get
#185000= F * 285#
#185000/285=F#
#37000/57=F#
#649.123N~~F#. This the answer to the first part of our question.
The second part of the question uses the formula for finding force put on an object
#F=ma#, where #F# is force in newtons, #m# is the mass of the object in kilograms, and #a# is the acceleration of the object. We know that #F=37000/57#, and the acceleration is due to gravity, making #a=9.81ms^-2#. Plug these values into the equation, and we get
#37000/57=m*9.81#
#37000/57 ÷ 9.81=m#
#66.17~~m#. This is the answer to the second part of our question.
I hope I helped!
