1. A 600 g lamp is supported midway along a wire stretched between two supports. The angle
    between the two supporting wire segments is 130⁰.
    a) What is the equilibrant of the lamp's weight?
    b) Compare the vertical force vector component of one supporting wire segment with the
        equilibrant of the lamp's weight.
    c) Find the force vector along each wire segment.
2. A lamp is supported midway along a wire stretched between two supports. The angle between
    the two supporting wire segments is 100⁰. The force vector along one segment is 30 N. Find:
    a) the equilibrant of the lamp's weight
    b) the lamp's weight
    c) the lamp's mass.
3. A 15 N horizontal force is applied to a rock just moves it across a level surface. If the µ =
    0.3, find:
    a) the rock's N
    b) the rock's weight
    c) the effect of a horizontal 10 N force on the rock
    d) the effect of a 20 N horizontal force on the rock.
4. A person pulls with 7 N up a rope which makes a 30⁰ angle with the ground and is attached to
    a box. If the µ = 0.5 and the box just moves, find the box's
    a) N
    b) weight
    c) mass.
5. A person pushes with a 17 N force down a lawnmower handle which makes a 35⁰ angle with
    the horizontal. If the 25 N mower just moves, what is the µ?
6. A 5.0 kg mass sits on a 25⁰ inclined plane. Find:
    a) the object's weight
    b) the weight vector components.
    c) If the component parallel to the plane's surface is just large enough to move the object,
       find the µ
    d) force to just move the object up the plane.
7. a) What physical characteristics determine the µ?
    b) Define the "F" and "N" forces.
    c) What would cause the µ to change?
    d) A box sitting on an inclined plane has its weight resolved into what components?
    e) State the effect of each of these component.
    f) When would the box move down the plane on its own?
    g) If an applied force is not strong enough to move an object along a surface, can the µ be
       determined?
    h) Can the µ be determined if the applied force causes the object to move rapidly?
    i) If the horizontal force applied to a box on the ground is less than the "F", how does the box
       respond?
    j) How does the box behave if the applied force is much larger than the "F"?
    k) When a horizontal force is applied to a box on the ground, which way does the F vector
        point?
    l) Do the weight vector components of a box on an inclined plane ever change their
       orientation?
    m) What force(s) oppose you as you try to pull a rock across the ground?
    n) What force(s) oppose you as you try to pull the rock up an inclined plane?
    o) When does the "N" = the weight of a rock on the ground?
    p) When is the "N" < the weight of the rock?
    q) When is the "N" > the weight of the rock?