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A 60 kilogram and a 90 kilogram skydiver jump from an airplane at an altitude of 6000 meter, both falling in the pike position. Make some assumption on their frontal areas and calculate their terminal velocities. Find how long will it take for each skydiver to reach the ground (assuming the time to reach terminal velocity is small)? Suppose all values are accurate to three significant digits.
The "Screaming Swing" is a carnival ride that is - not surprisingly - a giant swing. It's actually two swings moving in opposite directions. At the bottom of its arc, a rider in one swing is moving at 30 m/s with respect to the ground in a 56-m-diame..
A coffee filter of mass 1.4 grams dropped from a height of 3 m reaches ground with a speed of 0.7 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter.
A 58.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.700 and 0.480, respectively. What horizontal pushing force is required to just start the crate moving
Suppose the diameter of a basketball is d = 9inch, the size of a basketball rim D = 18 inches. A player is making a three point shot at L =10 meters away from the rim. Assume he release the ball at the highest point in a jump when his hands are at th..
Your little brother is sitting in a wagon playing with his toys. what was the velocity of the football when you threw it towards your brother
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 1.8 ms. Find the average net force that acts on him during this time
A metal cylinder of height h = 0.8m and cross-section S = 0.02m^2, is floating upright in water. The density of the metal cylinder is p metal = 550kg/m^3, and the density of water is p water = 1000 kg/m^3. Compute the length of the cylinder outside t..
A dock worker applies a stable horizontal force of 79.0 {rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {rm m} in the first 6.00 {rm s}.What is the mass of the bl..
A girl makes a microscope with a 3.0 cm focal length objective and a 5.0 cm eyepiece. the microscope tube length is 10 cm. Find expected magnification of this microscope
A uniform chain with a mass of 1.47 kg per meter of length is coiled on a table. One end is pulled upward at a constant rate of 0.381 m/s. Calculate the net force acting on the chain
each of the plates of a parallel plate capacitor has an area of 10.6cm2 and a plate separaton difference of 2mm.
The temperature of a sample of dilute argon gas withn = 7.3 moles decreases by196. If 35,900 Jof heat are extracted from the gas, what is the work done by thegas on its surroundings
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