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1. A hanging 2-kg block begins to accelerate a 4-kg block on a horizontal surface. But a rope connected to the wall at 60.8 degrees brings the block to an equilibrium position. What is the tension (to two decimal places) in the angled rope that is required to keep the block from accelerating? The coefficient of friction between the surface and the 4-kg block is 0.25.
a. How does the normal force compare to the weight of the block in this problem? Please explain fully.
2. A 2-mass system is established as shown in the animation above. The 2.0-kg mass is sliding on a surface inclined at 59.5 degrees. The 2.5-kg hanging mass is allowed to drop from rest. It takes 2.1 seconds for the hanging mass to fall through 1.5 meters and hit the ground. What is the coefficient of friction (to three decimal places) between the sliding mass and the incline? a. If the angle of the incline above is decreased, thereby changing the normal force, what would happen to the coefficient of friction? Please explain fully.
A rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. Calculate the final speed of the wire
the highest barrier that a projectile can clear is 13.1 m when the projectile is launched at an angle of 14.0deg above
A point charge Q1 is held at a distance r from the center of a dipole that consists of two charges ±q2 separated by a distance s. What is the magnitude of the force on the dipole
The energy levels of a localized particle are 0, epsilon , and 2 epsilon . The middle level is doubly degenerate and the other levels are nondegenerate. Write and simplify the partition function.
A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 35.0 N directed at an angle of 42.0 below the horizontal and the chair slides along the floor. Using Newton's laws, compute..
a 10,000kg railroad car is traveling with an initial speed of 24.0 m/s when it strikes an identical railroad car that is initially at rest. how much original kinetic energy was lost in this collision
A baseball player slides into second base during a steal attempt. Assuming reasonable values for the length of the slide, estimate the average force of friction acting on the player
An 88 kg spacewalking astronaut pushes off a 640kg satellite, exerting a 640N force for the 0.60 s it takes him to straighten his arms.
a slingshot fires a pebble from the top of a building at a speed of 11.1 ms. the building is 30.5 m tall. ignoring air
Object A is metallic and electrically neutral, Object B is identical to object A and is also electrically neutral, It is charged by induction so that it acquires a charge of +3.18E-6 C
If your plane flies 100km/s west relative to the ground, and another plane flies 75km/s north relative to the ground
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. What is the total mass of the wire
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