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We found that if a cue ball, rolling without slipping at speed v0, strikes an identical, stationary billiard ball head-on, eventually both balls will roll without slipping. The balls are uniform solid spheres, each of mass m, radius r, and moment of inertia I =2/5 m r^2 about its center. The final speed of the target ball is 5/7 *v0 ; that of the cue ball is 2/7 v0. Calculate the total fraction of the initial kenetic energy of the cue ball dissipated by frictional forces between the felt of the table and the two balls spinning or sliding, before they finally attain rolling without slipping at their respective final speeds.
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
Robin pushes a wheelbarrow with exerting a 145-N force horizontally. Robin moves it 60.0 m at a constant speed for 25.0 s. What power does Robin develop? If Robin moves the wheelbarrow twice as fast, how much power is developed?
A puck (mass m1 = 1.30 kg) slides on a frictionless table as shown in the figure below. The puck is tied to a string that runs through a hole in the table and is attached to a mass m2 = 3.9 kg. What is the change in the kinetic energy of the puck
two positive point charges each 17 lie along the -x axis at x -0.15 and x 0.15 . find the electric field at the
A woman starts to swim directly across a 7.4-km-wide river. Her speed with respect to the water is 1.3 m/s. How much time does it take her to cross the river
A capacitor consists of two plates which are 0.2mm apart from each other. The combined area of the two plates measures 14cm2. find the maximum electric charge on each of the plates
A steel ruler is calibrated to read true at 21.4 °C. A draftsman uses the ruler at 37.6 °C to draw a line on a 37.6 °C copper plate. To what temperature should the plate be cooled
how much work is required to turn an electric dipole 180deg in a uniform electric field of magnitude e 42.0 nc if p
Neglect air resistance, as well as any energy absorbed by the pole, and clerify her altitude as she crosses the bar.
A planetary probe is designed to drop the vehicle's instrument package from a height of 20 meters above the planet's surface, Evaluate the acceleration due to gravity at the surface of the planet
An ocean liner leaves New York City and travels 56.0° north of east for 170 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the following directions.
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