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Mechanical advantage is the ratio of the force required without the use of a machine (sometimes very simple machine) to that needed when using the machine. Compare the force to lift an object to that needed to slide the same object up a frictionless incline and show that the mechanical advantage of the inclined plane is the length of the incline divided by the height of the incline.
A charged particle A exerts a force of 2.75 ?N to the right on charged particle B when the particles are 12.0 mm apart. Particle B moves straight away from A to make the distance between them 17.6 mm. What vector force does particle B then exert o..
Dr. Bradshaw builds a slide. By lifting one side, he finds that when the slide makes an angle of 32 degrees with the horizontal, Jackson begins to slide. What is Jackson's acceleration
In the sketch, the small hydraulic piston has a diameter of 2.3cm. how many newtons of force are exerted by the large piston
A battery with an emf of 12.0 V shows a terminal voltage of 11.5V when operating in a circuit with two lightbulbs rated at 3.0 W, What is the battery's internal resistance
Two identical conducting small spheres are placed with their centers 0.395 m apart. Find the electric force exerted by one sphere on the other
A spring has a force constant of 100 N/m and an unstretched length of .07 m. What is the centripetal force on the disc
Light shines through a single slit whose width is 7.40 10-4 m. A diffraction pattern is formed on a flat screen located 3.2 m away. The distance between the middle of the central bright fringe and the first dark fringe is 3.25 mm. What is the wavelen..
A ball is traveling horizontally over a volleyball net when a player "spikes" it, driving it straight down to the ground. What is the magnitude of the impulse from the spike
An isolated copper sphere of radius 3.00cm, initially uncharged, is illuminated with ultraviolet light of wavelength 180nm. what charge does the photoelectric effect induce on the sphere
A sledge loaded with bricks has a total mass of 17.0 kg and is pulled at constant speed by a rope inclined at 19.9° above the horizontal. What is the mechanical energy lost due to friction
A 130 g ball with speed 7.5 m/s strikes a wall perpendicularly and rebounds in the opposite direction with the same speed. find the magnitudes of the average force on the wall
Three resistors of resistance 2 ?, 3 ? and 4 ? are connected in series with a 10 V battery. In which resistor is the greatest power dissipated
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