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A book of mass 5.2 kg is resting on a flat level table. You push down on the book at an angle of 25.0 degrees from the horizontal with force of magnitude 236 N. The book starts to slip and is sliding across the table. What is the magnitude of the force of kinetic friction from the table on the book? The coefficient of kinetic friction between the table and the book is μk = 0.43.
Electrons are accelerated through a potential difference of 39.0 V. The beam of electrons then passes through a single slit. estimate the width of the slit
steel train rails are laid in 12m long segments placed end to end. the rails are laid on a winter day when their
a 336 g oscillator has a speed of 110 cms when its displacement is 2.90 cm and 72.5 cms when its displacement is 6.10
An electron of kinetic energy 1.44 keV circles in a planeperpendicular to a uniform magnetic field. The orbit radius is 22.7cm. Find (a) the electron's speed,(b) the magnetic field magnitude,(c) the circling frequency (in Hz), and(d) the period of th..
A sailor strikes the side of his ship just below the surface of the sea. He hears echo of the wave reflected from the ocean floor directly below 9 s later. How deep is the ocean at this point.
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.
At t=0 a grinding wheel has an angular velocity of 24.20 rad/s. It has a constant angular acceleration of 24.2 rad/s^2 until a circuit breaker trips at t = 1.2 seconds.
The force constant of a spring is 800 N/m and the unscratched length is 0.63 m. A 4.6 kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.76 m.
A 5 m long string has a mass of 110 g and is under a tension of 900 N. What is the speed of a transverse wave pulse on this wire
A 13.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. The clay sticks to the block.what was the speed of the clay immediately before impact
you hit a ball of mass 0.5 kg. the force you apply to the ball is 20 n for a time of 0.3 s.a. what is the impulse?b.
Four resistors are connected to a battery with a terminal voltage of 15 V, as shown in figure. Determine the power delivered to R2. (R1 = 20 ohm;, R2 = 45 ohm)
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