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Q1. Florence the dog who weighs 140 Newton's stands on the bathroom scale in an elevator. What is the scale reading while an elevator accelerates downward at 2.00 m/s^2?
Q2. When an object is rolling without slipping, rolling friction force is much less than the friction force when an object is sliding; the silver dollar will roll on its edge much farther than it will slide on its flat side. When an object is rolling without slipping on the horizontal surface, we can approximate friction force to be zero, so that and are around zero and and are approximately constant. Rolling without slipping means and. If an object is set in motion on the surface without these equalities, sliding (kinetic) friction will act on object as it slips until rolling without slipping is established. A solid cylinder with mass and radius, rotating with angular speed about an axis throughout its center, is set on the horizontal surface for which the kinetic friction coefficient is.
In order to clearly read a book 24 cm away, a farsighted girl needs an image to be 35 cm from her eyes. What focal length is necessary for lens in her eyeglasses.
What could you expect the intrusion into the vechicle is, based on this information? Explain how you arrived at this intrusion.
What is mass of the block of ice
What is total mechanical energy of the motion
A 79, 37--long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 ball of clay travelling horizontally at 2.6 hits and sticks to the extremely bottom tip of the rod.
What is electric field in the wire
If a 200 N force F1 is applied to the piston with the 4 cm diameter, Calculate the magnitude of the force F2 that can be resisted by the piston with the 10 cm diameter? Ignore the weights of the pistons.
Two boats start together and race across a 56-km-wide lake and back. Boat A goes across at 52 km/h and returns at 56 km/h. Boat B goes across at 36 km/h, and its crew, realizing how far behind it is getting, returns at 79 km/h. Turnaround times are n..
The K-shell ionization energy of copper is 8979 eV. The L-shell ionization energy is 951 eV. Determine the wavelength of the Kα emission line of copper. What should be the minimum voltage be on an x-ray tube with a copper target in order to see the K..
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
The first electron has the initial velocity v0 that makes an angle θ=45° with the lower plate and has a magnitude of 7.53×106 m/s. would this electron strike one of the plates? If so, what is the horizontal distance from the left edge? If not enter t..
A harmonic wave travels in a wire with amplitude 6.05 mm, wavelength 0.451 m, and frequency 462 Hz. What is speed with which the wave travels.
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