A can of bolts and nuts is pushed 2.00 m along an x axis by a broom along the gr
ID: 1425176 • Letter: A
Question
A can of bolts and nuts is pushed 2.00 m along an x axis by a broom along the greasy (frictionless) floor of a car repair shop in a version of shuffleboard. The figure below gives the work W done on the can by the constant horizontal force from the broom, versus the can's position x. The scale of the figure's vertical axis is set by W_s = 5.1 J. What is the magnitude of that force? If the can had an initial kinetic energy of 2.30 J, moving in the positive direction of the x axis, what is its kinetic energy at the end of the 2.00 m displacement?Explanation / Answer
work done = Fx*x
Fx = W/x = slope of the graph
Fx = (5.1-0)/(2-0) = 2.55 N <<---------ANSWER
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(b)
from work energy theorem
work = change inKE
W = K2 - K1
5.1 = k2 - 2.3
K2 = 7.4 J <<---------ANSWER
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