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A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 850 kilogram helicopter rises from rest to a speed of 6.9 m/s in a time of 3.6 second. During this time it climbs to a height of 8.0 meter. Compute the average power generated by the lifting force?
Two identical small conducting spheres are separated by 0.60m. The spheres carry different amounts of charge and each sphere experiences an attractive electric force of 10.8N. The total charge on the two spheres is -24microC.
A 9 m, 260-N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.5, and the ladder makes a 50° angle with the ground. How far up the ladder can an 800-N person climb before the ladd..
A nuclear power plant generates 2000 MW of heat energy from nuclear reactions in the reactor's core. What is the plant's actual efficiency
Simple Pendulum with length 1m released from rest from angle of 20 degrees from the vertical and to the left of the equilibrium position. What is the maximum angle (measured from the vertical) of the string when the ball is on the right
Calculate the rotational inertia of a meter stick, with mass 0.576 kg, about an axis perpendicular to the stick and located at the 29.9 cm mark
q1. a person eats a dessert that contains 220 calories. this calorie unit with a capital c is the one used by
A subway train has a sound intensity level of 90 dB, and a boiler shop has a sound intensity level of 100 dB. How many times greater is the new sound intensity of the shop than that of the train?
Estimate the terminal speed of a wooden sphere (density 0.810 g/cm3) falling through air, if its radius is 8.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.)
A 16 kg rock, m, is on the edge of a 90 m cliff, h, as shown in Figure 11-20. Assume that air resistance is negligible. What speed does the rock have as it strikes the ground
A world-class sprinter accelerates to his maximum speed in 4s . He then maintains this speed for the remainder of a 100m race, What is his average acceleration for the entire rac
In the Biomedical and Physical Sciences building at MSU there are 132 steps from the ground floor to the sixth floor. Each step is 16.6 cm tall. How many food Calories did the person burn during the walk
Man pushes a 27-kg block 9.1 m along a level floor at constant speed with a force directed 45° below the horizontal. how much work does the man do on the block
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