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A box rests on top of a flat bed truck. The box has a mass of m = 16.0 kg. The coefficient of static friction between the box and truck is ?s = 0.81 and the coefficient of kinetic friction between the box and truck is ?k = 0.63. * The truck accelerates from rest to vf = 19.0 m/s in t = 12.0 s (which is slow enough that the box will not slide). What is the acceleration of the box? m/s2 * In the previous situation, what is the frictional force the truck exerts on the box?
Eight books, each 4.9 cm thick with mass 1.2 kg, lie flat on a table. How much work is required to stack them one on top of another.
A diver running 1.8 m/s dives out horizontally from the edge of a vertical cliff and 2.7 s later reaches the water below. How far from its base did the diver hit the water
How much voltage is produced by an inductor of value 25 ?H if the time rate of change of the current is 58 mA/s
A particle moves along the x-axis. Its position varies with time according to the expression x(t) = -4t + 2t2, where x is in meters and t is in seconds. a) Determine the displacement of the particle in the two time intervals t = 0 to t = 1 s and t..
A concave mirror produces an upright virtual image that is 3.00cm times taller than the object. The focal length is 15.0cm. Dtermine the distance to the image
Use the natural and dual basis vectors to determine the metric tensors g i j and gi j , and the line element, for the coordinate system introduced in Example 2.2. Verify explicitly that the matrices g i j and gi j found for this problem are inverses ..
One of the weapons considered for the "Star Wars" antimissile system is a laser that could destroy ballistic missiles. What laser beam intensity will produce such a field
A series circuit is connected to a 220-V, 60-Hzpower supply. The circuit has the following components: a 16? resistor, Compute the rms voltage across the resistor
Thermal energy can shift some of the electrons in a hot semiconductor from valence levels to conduction levels. What effect do these shifts have on the semiconductor's ability to conduct electricity.
A clay vase on a potter's wheel experiences an angular acceleration of 8.21 rad/s2 due to the application of a 17.7-N m net torque. Find the total moment of inertia of the vase
a 150g bullet is fired from a rifle with a barrel of length 65cm the bullet starts from rest at one end of the barrel, find the speed of the bullet as it leaves the rifle
A 111 gram apple falls from a branch that is 3.5 meters above the ground, How much time elapses before the apple hits the ground
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