Henry can lift a 200 N load 20 m up a ladder in 40 s. Ricardo can lift twice the load up one-half the distance in the same amoun
2 answers:
Answer:
A. Ricardo exerted a greater force, did the same amount of work, and had the same power output as Henry.
Explanation:
Word done is the product of force and displacement. Power is the rate change of energy consumed.
Henry applied a force of 200 N lift the load up a distance of 20 m in 40 s.
Work done by Henry,
Power output,
Ricardo applied a force of 400 N lift the load up a distance of 10 m in 40 s.
Work done by Henry,
Power output,
Thus, the word done and power output by both Henry and Ricardo are equal but the force exerted by Ricardo is greater.
You might be interested in
Answer:
44.85C
Explanation:
Let the specific heat of glass thermometer be 0.84 J/g°C
Let the specific heat of water be 4.186 j/g °C
Let the water density be 1kg/L
136 mL of water = 0.136L of water = 0.136 kg of water = 136 g of water
Since the change of temperature on the glass thermometer is 43.6 - 22 = 21.6 C. We can then calculate the heat energy absorbed to it:
Assume no energy is lost to outside, by the law of energy conservation, this heat energy would come from water