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A box of books is initially at rest a distance D = 0.367 m from the end of a wooden board. The coefficient of static friction between the box and the board is µs = 0.379, and the coefficient of kinetic friction is µk = 0.303. The angle of the board is increased slowly, until the box just begins to slide; then the board is held at this angle. Find the speed of the box as it reaches the end of the board.
An arrow is shot at an angle of theta=45 above the horizontal. The arrow hits a tree a horizontal distance D=220m away, at the same height above the ground as it was shot. Use g=9.8 m/s^2 for the magnitude of the acceleration due to gravity
you measure wavelength divided by 2 to be 70cm. The temperature in the lab is 22 degrees celsius. What is the frequency of the resonance
A charge of -3.0 nC is at the origin and a second charge of 15.0 nC is at x = 7.00 m. Find the magnitude and direction of the electric field
consider electrons accelerated to an energy of 20.0 gev in the 3.00 km long standford linear accelerator. a what is the
A 2kg block initially hangs at rest at the end of two long strings of negligible mass as shown in the diagram below. a 150 g bullet, moving horizontally with some speed, strikes the block and appears from other side at speed of 350 m/s. after the ..
an electron initially traveling in the x-direction with a speed of 4 x 105 ms enters a uniform electric field directed
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 2100 V/m, Calculate the radius r of the path for a singly charged ion with mass m = 2.29 10-26 kg
If 43.0 cm of copper wire(diameter=1.22 mm, resistivity=1.69E-8?·m) is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing at the constant rate of 9.51 mT/s
What is the jet's acceleration and what is the jet's speed after it accelerates for 6 s - What is the net force on the motorcycle
A 0.24-kg block rests on a table, and a 012-kg is placed on top of it. What is the highest angular frequency for which the upper block will not slip with respect to the lower block
A very long, straight solenoid with a cross-sectional area of 2.30cm2 is wound with 93.4turns of wire per centimeter. What is the magnitude of the emf induced in the secondary winding at the instant that the current in the solenoid is 3.2
A hand exerciser utilizes a coiled spring. A force of 85.0 N is required to compress the spring by 0.0151 m. Determine the force needed to compress the spring by 0.0503 m.
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