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A 100-kg mass is pulled along a frictionless surface by a force F such that its acceleration is 6 m/s2. A 20-kg mass slides along the top of the 100-kg mass and has an acceleration of 4 m/s2.(It thus slide back relative to the 100-kg mass). What is the frictional force in newtons exerted by the 100-kg mass on the 20-kg mass?
A car drives on a level circular track. The coefficient of friction between the tires and the track is 0.640. What is the radius of the track
In an electric shaver, the blade moves back and forth over a distance of 2.0 mm. The motion is simple harmonic, with frequency 92 Hz. (a) Find the amplitude. mm (b) Find the maximum blade speed. m/s (c) Find the magnitude of the maximum blade acceler..
Use Ampere's Law to find the magnetic field inside and outside a straight wire of radius Rcarrying current I uniformly distributed over it's circular cross-sectional area A.
The coefficient of static friction between the wall and the rod is μs = 0.575. Determine the minimum distance x from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A.
a picture window has dimensions of 1.40m x 2.50m and is made of glass 5.20mm thick. on a winter day the outside
A 17.00{\rm kg} lead sphere is hanging from a hook by a thin wire 3.30{\rm m} long, What must be the minimum initial speed of the dart so that the combination makes a complete circular loop after the collision
Four particles with masses 9kg, 4kg, 9kg, and 3kg are associated by rigid rods of negligible mass as shown. Assume the system rotates in the yz plane about the x axis with an angular speed of 9 rad/s. Find out the moment of inertia of the system a..
Two skaters, one with mass 65 kg and the other with mass 60 kg, stand on an ice rink holding a pole of length 10 m and negligible mass. How far does the 60 kg skater move
An object is placed 2.0 cm from a converging lens with focal length 1.5 cm. Determine the location of the final image
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
Two co-centric hollow spheres have radii of R1 and R2 and have uniform surface charge densities s1 and s2. The two charge densities are positive. Derive an expression for the electric field
Beams of high-speed protons can be produced in "guns" using electric fields to accelerate the protons. (a)What acceleration would a proton experience if the gun's electricfield were 2.18 x 104 N/C?
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