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A 5.5- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.1 m/s2, what is the coefficient of friction between the block and the table?
The motion of peg P is constrained through the lemniscate curved slot in OB and by the slotted arm OA.
The mass of a roller-coaster car, including its passengers, is 495kg. Its speed at the bottom of the track in the figure below is 17.00 m/s. The radius of this section of track is r1 = 26 m. Find the force that a seat in the roller-coaster car exerts..
An 800 g ball moves in a vertical circle on a 1.07-m-long string. If the speed at the top is 5-m/s, after that the speed at the bottom would be 8.18 m/s.
The electric potential inside a conducting sphere is 245V, and a distance d = 32.0cm from the surface of the sphere, the potential is 175V. Calculate (a) the radius of the sphere and (b) the charge on the sphere.
A 57 kg student sits on a chair which is solely supported by a solid 1/2 meter long steel rod 1cm in diameter. To the nearest micron (millionth of a meter) what is the change in length of the rod produced by the student's weight.
A 1300 N uniform boom is supported by a cable perpendicular to boom. The boom is hinged at the bottom, and a 2100N weight hangs from its top.
Four equal charges of +2.5×10-6 C are placed on the corners of one face of a cube of edge length 15.0 cm. A charge of -2.5×10-6 C is placed at the center of the cube. What is the magnitude of the force on the charge at the center of the cube?
Describe its motion. (Will it slide forever at a constant velocity? Will it slide to a stop? Illustrate in what way will its energy changes be similar to that of a pendulum?)
A stockroom worker pushes a box with a mass 11.2kg on a horizontal surface with a constant speed of 3.50m/s. coefficient of kinetic friction between the box and the surface is 0.20.
An antitank weapon fires a 4kg rocket which acquires a speed of 50.0 m/s after travelling 90 cm down a launching tube. Assume the rocket was accelerated uniformly, what is the average force acted on it.
An airplane is flying in a horizontal circle at the speed of 542 km/h. If the wings of the plane are tilted 33.0° to the horizontal, what is the radius of the circle in that the plane is flying? Suppose that the required force is provided entirely by..
What is the least coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road.
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