2. A nurse pushes a patient in a wheelchair up a \( 9.7 \mathrm{~m} \) ramp with a force of \( 92 \mathrm{~N} \) parallel to the ramp. The patient and wheelchair have a total mass of \( 67 \mathrm{~kg} \) and the ramp is \( 0.8 \mathrm{~m} \) higher at the top than at the bottom. a. Calculate the input work done by the nurse in pushing the patient up the ramp. (3 marks) b. Calculate the output work accomplished by raising the patient. (3 marks) c. Determine the efficiency of the ramp. (3 marks) d. How could the efficiency of the ramp be improved? (1mark)
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