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A 2Kg wood block is attached to a .3 g bucket by a massless string rests on the durface of and inclined plan of 20 degrees. the coefficient of friction between the block and the inclined plane are static friction is equal to .4 and kinetic friction of .2
In a head-on collision, a car stops in 0.19s from a speed of 26m/s The driver has a mass of 63kg and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second
A long thin solenoid has 55 turns/cm and carries a current of 0.212 A. The solenoid is filled with iron and the magnetic field is measured to be 1.49 T.
A bullet with mass 4.88 g is fired horizontally into a 2.106-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
A child is riding a merry-go-round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration os 0.745 rad/s^2. What angle does the acceleration of the child make with the tangential direction
A stockroom worker pushes a box with mass 11.2 kg on a horizontal surface with constant speed of 3.50m/s. What horizontal force must the worker apply to maintain the motion
question1an airplane in a wide outside loop can create an apparent zero weight inside the aircraft cabin. what should
What is the smallest probable displacement of shopper.
A block with mass m = 16.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 5205.0 N/m after being compressed a distance x1 = 0.481 m from the spring's unstretched length. What is the speed of the block after..
A 500-g block is released from rest and slides down a frictionless track that begins 2.40 m above the horizontal, Find the maximum distance the spring is compressed
What is minimum important in returning blood to the heart? Negative intrathoracic pressure, valves and veins, the pumping action of skeletal muscles, or the pushing of blood by arterial system.
A Galilean design telescope is to be made with an objective of focal length 450 mm with an angular magnification of 18. What should the focal length of the eyepiece be
A photon of wavelength 0.1800 nm strikes a free electron that is initially at rest, What is the energy of the photon (in eV) after it has scattered from the electron
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