Question

The Mars Mission is already in Mars, but cartographic problems caused that the module landed in a slope as it is shown in figure c). with the help of a special car and a rope the crew pull the module till the point A. The figure d) show the evolution of the tension in the rope as time goes on considering that the motion is always with a costant velocity.

a) Explain in your own words the three regions in the plot of figure d)

b) Draw a free body diagram for the forces acting on the module when it is pulled over the slope

c) If uk = 0,1 (kinectic friction coefficient), find the Mars gravity aceleration

d) find the Us ( Static friction coefficient)

0.8 m 0.4m 1m TN 12,527 8.682 1,480

Answer 1

To when the special car stant The module will not move applying force till Tension at TEO, in the robe en 12.527 N. weight component This and tension will be used to balance static friction along the plane. 1 0 After this once changes from will be used block Starta moves Static to Kinetic and to balance Kinetic friction coefficient Tonion T= 8.682 N friction and weight Component along the plane To In zone three slope in zao, 1-1480 will be used only to balance Kinetic friction of the medule. FBD too O let s is Maret FB). gravity. acceleration for © ams Long msbond ms Sing II Moms ms Sing she Mms Cons. mg Mms Cena To Mms Con Q4 ms Sing SE MEMS MA 8.68 2 = Mx M. SX52 + M.S.) Ims: 14.80 1.480 2 0.18 ms -MS- 14.80]

ALOO 12.521 - Me.ms condt ms sing. but ms= 14.80 - 12.522-7.43 Ms. 6.4×1.73). Mg: 0.4