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Two blocks are connected by a light cord. One block, of mass 4kg, sits on a horizontal table with static and kinetic coefficients of friction of 0.6 and 0.4, respectively, whereas the other block, of 2 kg mass, hangs over a frictionless light pulley. The blocks are released from rest. (a) Draw a carefully labeled free body diagram for both blocks and, by using Newton's laws, show that they do not move. (b) If the two blocks are exchanged, so that the 4 kg is now the hanging block and the 2 kg sits on the table, find their acceleration now. (c) In words, state why the tension in the cord is equal to the weight of the hanging block in part(a) but not in part(b). (d) What is the minimum mass that one needs to add to the 2 kg block in part(b) for it to remain at rest when released?
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
A 50 lbf object is dropped from a height of 53 ft. Neglecting air resistance. At what velocity will the object strike the ground
It walks 2.4m along the boat toward shore and the nstops Assuming no friction between the boat and the water, find out how far the dog is then from the shore
A 2.40cm × 2.40cm square loop of wire with resistance 1.10×10?2? has one edge parallel to a long straight wire. calculate the current in the loop
a police officer in hot pursuit drives her car through a circular turn of radius 300m witha constant speed of 80.0km/h. what are the magnitude and the angle relative to vertical of the net force
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s.
A 55.1-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. Determine the force exerted by the horizontal rope on her arms
In a Young's double-slit experiment, the wavelength of the light used is 535 nm (in vacuum), Determine the angle in degrees that locates the second dark fringe
consider the electrons of a speed .99999999967c of produced by the stanford linear accelerator, what is the magnitude of momentum of such an electron
When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 N backward on the ground for 0.800 s. What is his final speed
An object is initially placed on the optical axis 27.1 cm to the left of a convex lens that has a focal length of 14.7 cm. The image is real and inverted. what is the new image distance
A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 1.5kg. Its volume is 2.5m^3. What is the average density of the balloon with gas
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