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A table with smooth horizontal surface is placed in a cabin which moves in a circle of a large radius R (figure 7-E5). A smooth pulley of small radius is fastened to the table. Two masses m and 2m placed on the table are connected through a string going over the pulley Initially the masses are held by a person with the strings" along the outward radius and then the system is released from rest (with respect to the cabin). Find the magnitude of the initial acceleration of the masses as seen from the cabin and the tension in the string.
A car tire has a radius of 0.290 meter, and its center moves forward with a linear speed of v = 18 meter per second. Relative to the axle, evaluate the tangential speed of a point located 0.175 meter from the axle
An object with total mass mtotal = 15.8 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.6 kg moves up and to the left at an angle of ?1 = 19.0° above the –x axis with a speed of v1 = 27.8 m/s.
In each of the diagrams below, one or more external forces act on the indicated system. Which of the forces listed below are the reaction to the external force mentioned? (Select all that apply.)(a) the mower exerts a forceupward on the Earth due to ..
Two point charges each of magnitude 1.70 µC are located on the x axis. One is at x = 1.00 m and the other is at x = -1.00 m. Calculate the change in electric potential energy of the system
An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat c..
An arrow is fired with a speed of 17.0 m/s at a block of Styrofoam resting on a flat surface. Find how long does it take for the arrow to stop moving with respect to the block
A copper pipe with an outer radius of 0.014 m runs from an outdoor wall faucet into the interior of a house. Find the inner radius of the pipe
A 2180kg satellite used in a cellular telephone network is in a circular orbit at a height of 750km above the surface of the earth. What is the gravitational force on the satellit
A rotating bicycle wheel has an angular speed of 3 rad/s at T= 0. It is also given an angular acceleration of 1.5rad/s^2, What is the angular displacement during the first two seconds
The sun radiates energy at a rate of 3.86 ? 1026 W. Its radius is 7.0 ? 108 m. If the distance from the Earth to the sun is 1.5 ? 1011 m, what is the intensity of solar radiation at the top of the Earth's atmosphere?
Two masses, 10kg and 20 kg hang from a pulley (Atwoods) with moment of inertia, I = 0.4 kg-m2, and radius,r=0.2 m. What is the linear acceleration of the mass system
A 40 kg box is sliding down a ramp angled at 15 down from the horizontal. The box is accelerating at 1.5 m/s^2 down the ramp. Ignoring air resistance, what is the force of friction between the box and the ramp?
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