A uniform 2.45m ladder of mass 7.70kg is leaning against a vertical wall while making an...
A uniform 2.45m ladder of mass 7.70kg is leaning against a vertical wall while making an angle of 53.0? with the floor. A worker pushes the ladder up against the wall until it is vertical.
Homework Answers
The center of mass of the vertical ladder is 2.45/2 = 1.225 m above the floor
The center of mass at the 53 degree angle is from the sin function...
sin(53) = y/1.225
y = .978 m
The distance it rises is 1.225 - .978 - .247 m
W = mgh
W = (7.70)(9.8)(.247)
W = 18.6 Joules
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