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Q. A 490 kg bear grasping a vertical tree slides down at steady velocity. What is the friction force that acts on the bear?
What is an acceleration of the particle at the instant
Presume the electron is at the midpoint between the proton.
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
This is because of the average release of about 0.03 J per kilogram each year. Show that at 500 C increase in temperature for a thermally insulated chunk of granite takes about 13.3 million years. (Assume that the specific heat of capacity c of g..
Three single-phase step-up transformers rated at 10MVA, 4.6kV/13.8kV are connected in Wye-Delta configuration. The three transformers are used to feed a 20MVA load at 0.9 p.f. With an efficiency of 96%. Find the secondary line voltage.
A box weighing 300N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.2° below the horizontal. If the coefficient of kinetic friction between the box and the floor is 0.540, how long does it take to mov..
At full power, how long would it take for car to accelerate from 0 to 56 mph? Neglect friction and air resistance.
A rocket blasts off from a platform on a space station. An identical rocket blast off from free space. Considering that everything else is equal, will the two rockets have the same acceleration? define.
Find out the magnitude of the friction force acting on the case. Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence. What slit separation would produce first-order maxima at angles of 40 from the incident direction.
In the figure, suppose that the separation between speakers A and B is 5.90 m and the speakers are vibrating in phase. They are playing identical 110-Hz tones, and the speed of sound is 343 m/s.
A spring with spring constant 19 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 2.5 and released. The ball makes 33 oscillations in 15 seconds. What is its utmost speed.
what is the kinetic energy of the system. assume the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it ..
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