with detailed solution

#X7 Yuri wants to jog. Yuri started her morning exercise by running eastward 20.0|m], turned around, then jogged westward 30.0[m]. It took her 30.0[s]to complete her eastward jog and 15.0 s] for her westward run. Taking east as the +a-direction, what was her average velocity for the entire duration of her exercise? Select one: O -0.22 m/s]i O 0.90 [m/s]i O 1.1lm/s]i O -4.50[m/s]i#X7 Slide down. A cube is placed on top of a 10.0[m] ramp with coefficient of kinetic friction / = 0.350 and inclined at angle of 0 = 50.0. If the box slides down from rest, what is the magnitude of the cube's velocity as it reaches bottom of the ramp? 10.0 [m] H, = 0.350 50.0 Select one: O 11.8[m/s] O 8.32[m/s] O 7.29[m/s] O 10.3[m/s]#X7 We goin' up, up! Two blocks connected by massless rope passing through a frictionless and massless pulley is setup as shown with m = M and B = 63.0. The surface between M and the incline is rough with coefficient of friction . What is the value of / if both blocks move with constant speed v? m Select one: O 0.844 O 0.0555 O 0.240 O 0.613