A man whose mass is 100 kg pushes a cart whose mass, including its contents, is 100 kg up...

A man whose mass is 100 kg pushes a cart whose mass, including its contents, is 100 kg up a ramp that is inclined at an angle of 20° from the horizontal. The local gravitational acceleration is 9.8 m/s2. Determine the work, in kJ, needed to move along this ramp a distance of 100 m considering (a) the man and (b) the cart and its contents as the system.

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