_. The helicopter View in the figure shows two people pulling on a stubborn mule. The person on the right pulls with a force F1 of magnitude 91.5 N and direction of \\91 : 70.0\". The person on the left pulls with a _, force F2 of magnitude 87.3 N and direction of 62 : 80.0\". (D (a) Find the single force that is equivalent to the two forces shown. The forces are measured in units of newtons (symbolized N). S ~ 7 + E N: (b) Find the force that a third person would have to exert on the mule to make the resultant force equal to zero. :~r+:~j Neednem A fly lands on one wall of a room. The lower-left corner of the wall is selected as the origin of a two-dimensional Cartesian coordinate system. The fly is located at the point having coordinates (1.95, 0.80) m. (a) How far is it from the origin (in m)? m (b) What is its location in polar coordinates? (Enter r in meters and 0 in degrees.) = m 0 = . counterclockwise from the +x-axis (c) What If? If the wall is 14.0 m long and 4.0 m high, which choice of origin would give the fly the largest distance from the origin? O top left corner of the wall O top right corner of the wall O bottom left corner of the wall O bottom right corner of the wall (d) What is the distance of the fly from this new origin (in m)? m Need Help? Read It Watch ItA person going for a walk follows the path shown in the figure, where y, = 310 m and 0 = 54.0. The total trip consists of four straight-line paths. At the end of the walk, what is the person's resultant displacement measured from the starting point? magnitude m direction counterclockwise from the +x axis Start 100 m - X End y1 200 m 30.0 150 m Need Help? Read It Master ItThe instantaneous position of an object is specified by its position vector leading from a fixed origin to the location of the object modeled as a particle. Suppose for a certain object the position vector is a function of time, given by r = 3 i + 2 j - 2t k, where i is in meters and t is in seconds. (a) Evaluate dr/dt. i + 1j + k ) m / s (b) What physical quantity does di/dt represent about the object? O the acceleration vector O the displacement vector O the velocity vector Need Help? Read It Watch It