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Quiz #1
1. An acre is equal to 160 square rods, where 1 rod = 5.5 yards and 1 yard = 0.914 meters. How many square meters are there in an acre?
2. A particle undergoes four successive displacements, A, B, C, and D. Determine the resultant displacement, using both graphical and rectangular component methods.
A = 80 m along the positive x axis
B = 60 m at 30o above the positive x axis
C = 40 m at 45o above the negative x axis
D = 100 m at 60o below the negative x axis
a. Graphical solution
b. Rectangular component solution
3. If a force of 86 N parallel to the surface of a 20o inclined plane will push a 120 N block up the plane at constant speed, what force parallel to the plane will push it down at constant speed?
What is the coefficient of kinetic friction between the block and the plane?
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