Part A = F = mg/2
Part B = Wd / Wp = 1.00
What is the magnitude F of the upward force you must apply to the rope to start raising the box with constant velocity?
What is Wd / Wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?Click for More...
Part A = 455.165 km
Part B = 8.9523 g
Part C = 3.1107 g
Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4g of fat to fly over a distance db without stopping for feeding. How far will the bird fly before feeding again?
How many grams of carbohydrate mcarb would the bird have to consume to travel the same distance db?
Field observations suggest that a migrating ruby-throated hummingbird can fly across the Gulf of Mexico on a nonstop flight traveling a distance of about 800 km. Assuming that the bird has an average speed of 40.0 km/hr and an average power consumption of 1.70 W, how many grams of fat does a ruby-throated hummingbird need to accomplish the nonstop flight across the Gulf of Mexico?