How much work has been done as the crate is raised

Reference no: EM1382874

Q. A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source?

Q. Pete slides a crage up a ramp at an angle of 30 degrees by exerting a 225-N force parallel to the ramp. The crate moves at constant speed. The coefficient of friction is 0.28. How much work has been done as the crate is raised a vertical distance of 1.15m?

Reference no: EM1382874

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