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Two blocks are arranged at the ends of a mass- less string as shown in the figure. The system starts from rest. When the 1.47 kg mass has fallen during 0.326 m, its downward speed is 1.25 m/s. The acceleration of gravity is 9.8 m/s2.
What is the frictional force among the 3.02 kg mass and the table?
Betty weighs 408 Newton. She is sitting on a playground swing seat that hangs 0.41 meter above the ground in its rest position. Find the magnitude of the work done by friction during this time
A migrating bird is initially flying south at 10 m/s. To avoid hitting a high-rise building, the bird veers and changes its velocity to 3 m/s east over a period of 2 s. What is the bird's average acceleration (magnitude and direction) during this ..
An iceboat of mass 100 kg is at rest on a frictionless frozenlake when a sudden wind exerts a force Fwind ofmagnitude 200N, What is the velocity of the iceboat
Carbon disulfide (CS2) has a vapor pressure of 300 Torr at room temperature (almost half of atmospheric pressure). estimate the average time between collisions
The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately . Find the distance from the car at which the sound from the stereo can still be discerned. Assume that the windows are rolled down and that ea..
An airplane of wing span 40.0 m flying horizontally at a speed of 774 km/h due north in a region where the vertical component of the earth's magnetic field is 4.75 *10^-5 T. Find the emf induced across its wing
A military helicopter on a training mission is flying horizontally at a speed of 90.0m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 390m. How far does it travel horizontally while falling
A 91-kg man’s thighbone has a relaxed length of 0.50 m, across-sectional area of 7.0 x 10^–4 m^2, and a Young’s modulus of 1.1 x10^10 N/m^2. By how much does the thighbone compress when the manis standing on both feet?
A tree loses water to the air by the process of transpiration at the rate of 110 g/h. what is the upward speed of the sap in each vessel
Two forces act on a 1.6 kg box. One of the forces is known to be Fvec = 4.7ihatbold N. The acceleration is measured to be avec = (-1.9 ihatbold - 2.8 jhatbold) m/s2. Find the second force in unit-vector notation
The tension at which a fishing line snaps is commonly called the line's "strength." Compute what minimum strength is needed for a line
Find the electric field of a rod with length (L), total charge (Q), and distance (r) from the center of the rod along the axis of the rod when r > L/2
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