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A trunk with a weight of 230 N rests on the floor. The coefficient of static friction between the trunk and the floor is 0.32, while the coefficient of kinetic friction is 0.22. a) What is the minimum magnitude for a horizontal force with which a person must push on the trunk to start it moving? b) Once the trunk is moving, what magnitude of horizontal force must the person apply to keep it moving with constant velocity? c) If the person continued to push with the force used to start the motion, what would be the acceleration of the trunk?
Diane (weight 255 N) is practicing on a tightrope that is 6.00 meters long and sags by 0.120 meters. find the force on each eyebolt holding the tightrope
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 82.1 N, Jill pulls with 64.3 N in the northeast direction, What is the direction of the net force
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; at the high point, or apogee, it is 2500km above the earth's surface. What if the rockets were fired ..
A 0.50 kg ball that is tied to the end of a 1.30 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical. If the cord can withstand a maximum tension of 9.5 N, what is the highest speed at which ball can ..
An object has a kinetic energy of 237 J and a momentum of magnitude 29.3 kg·m/s. Find the speed and the mass of the object
A sphere of styrofoam with a density of 152 kg/m3 has a 45 cm diameter. what is the maximum iron mass that can be suspended by a string from it so that it does not sink
A gymnast of mass 69.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
Two small plastic spheres each have a mass of 1.9g and a charge of -60.0nC, By what factor is the electric force on a sphere larger than its weight
What is the magnitude of an average acceleration of the ball
A cylindrical container 1.60 {rm m} tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water.
How much work has he done? (b) Another player, wearing clothes that offer better protection against heat loss, is able to remain in the game long enough to do 2.1 × 105 J of work. What is the magnitude of the heat that he has lost?
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