1)Calculate the work done by a mother who exerts a force of 8 N at an angle of 40 degrees below the horizontal x-axis in pushing her baby in a carriage to a distance of 20 m.
2) A 60-kg patient exercises on the treadmill, exerting a constant force of 500 N while running at a constant velocity of 4 m/s at an angle of the treadmill 30 degrees for 5 minutes. The coefficient of kinetic friction of the treadmill is 0.45. Determine the work done by the patient.
3) In transporting a patient on a wheelchair up an inclined ramp at an angle of 20 degrees with the horizontal ground, an attendant exerts a force of 1400 N, resulting in a velocity of 2.5 m/s. Calculate the power produced by the attendant.
4) The amount of oxygen used by the body in metabolism is proportional to the energy yield, with 1 liter of oxygen combining with foods to produce about 20, 000 joules. If the oxygen consumed in one misute is 1.5 liters during vigorous exercise, what is the metabolic rate in watts?
2) A 60-kg patient exercises on the treadmill, exerting a constant force of 500 N while running at a constant velocity of 4 m/s at an angle of the treadmill 30 degrees for 5 minutes. The coefficient of kinetic friction of the treadmill is 0.45. Determine the work done by the patient.
3) In transporting a patient on a wheelchair up an inclined ramp at an angle of 20 degrees with the horizontal ground, an attendant exerts a force of 1400 N, resulting in a velocity of 2.5 m/s. Calculate the power produced by the attendant.
4) The amount of oxygen used by the body in metabolism is proportional to the energy yield, with 1 liter of oxygen combining with foods to produce about 20, 000 joules. If the oxygen consumed in one misute is 1.5 liters during vigorous exercise, what is the metabolic rate in watts?