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A space station is to provide artificial gravity to support long-term stay of astronauts and cosmonauts. It is designed as a large wheel, with all the compartments in the rim, which is to rotate at a speed that will provide an acceleration similar to that of terrestrial gravity for the astronauts (their feet will be on the inside of the outer wall of the space station and their heads will be pointing toward the hub). After the space station is assembled in orbit, its rotation will be started by the firing of a rocket motor fixed to the outer rim, which fires tangentially to the rim. The radius of the space station is R = 46 m, and the mass is M = 2.7 105 kg. If the thrust of the rocket motor is F = 1.2 102 N, how long should the motor fire?
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin(2?t), Find the angular frequency of the driven system
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
A hand-driven tire pump has a 2.50 cm diameter piston and a maximum stroke of 34.0 cm. What average force do you exert on the piston, neglecting friction and gravity
A massless spring is compressed between blocks of mass x and 5x on a smooth horizontal frictionless surface. What fraction of the total energy does the small block recieve
A 51.5 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.110 m/s. How much work must be done to stop it
His arm is 70 cm long and has a mass of 4.0 kg. Illustrate what is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
An electric trimmer blade has rotational inertia 1.85×10^-4 kg*m^2. How much work was done to accelerate the blade
Using the idea of a dozen as an example again, if you have 2 dozen blocks and their total mass is 48 kg, What is the mass of a single molecule
a ray of light traveling through one type of glass, In which type of glass does light travel at a higher speed
A person pushes a 16.0 kg shopping cart at a constant velocity for a distance of 26.0m. what is the magnitude of the force that the shopper exerts
A person swimming 0.80 m below the surface of the water in a swimming pool looks at the diving board that is directly overhead, What is the actual height of the diving board
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