# Search results

1. ### Infinite Sheets of Charge

1. Homework Statement An infinite sheet of charge, oriented perpendicular to the x-axis, passes through x = 0. It has area density = -3 micro C/m^2. A thick, infinite conducting slab, also oriented perpendicular to the x-axis, occupies the region between x=a and x=b where a = 4 cm and b=5...
2. ### Coaxial Cylindrical Conductors

1. Homework Statement Two coaxial cylindrical conductors are shown. The inner cylinder has radius a = 2 cm, length 10 m, and carries a total charge of Q inner = +8nC. The outer cylinder has an inner radius b = 6 cm, outer radius c= 7 cm, length 10 m, and carries a total charge of Q outer =...
3. ### Spherical Shell Insulator

1. Homework Statement An insulator in the shape of a spherical shell is shown. The insulator is defined by an inner radius a = 4 cm and an outer radius b = 6 cm and carries a total charge of Q = +9 microC. You may assume that the charge is distributed uniformly throughout the volume of the...
4. ### Decibels, pressure & displacement amplitudes

1. Homework Statement A jackhammer emits sound at a decibel level of 130 dB. The wavelength of the sound is 1.0 m. What is the linear sound intensity? What is the pressure amplitude? What is the displacement amplitude? 2. Homework Equations Beta = 10 log (I / Io) ...and...
5. ### Pendulum oscillation

1. Homework Statement A student decides to use a simple pendulum to check the shutter time of her camera. A meter stick is laid horizontally, and a simple pendulum is set up so that, when it is hanging vertically, the mass falls on the 50.0 cm mark of the meter stick. The pendulum is set...
6. ### Simple Harmonic Motion with 2 beads

1. Homework Statement A small bead of mass m1 slides without friction in a spherical bowl of radius R. The bead is displaced a height h1 from the bottom of the bowl. A second, more massive bead of mass m2 is displaced a height h2 from the bottom of the bowl opposite the first bead. The two...
7. ### Exploding projectile

1. Homework Statement A fireworks rocket is fired with a speed of 80 m/s at an angle of 60 degrees above the horizontal. At the highest point of its trajectory, the projectile explodes into two fragments, one three times heavier than the other. The two fragments hit the ground at the same...
8. ### Center of Mass Frame for Elastic Collision

1. Homework Statement Two spheres of equal radius and masses 5.00 kg and 15.0 kg are sliding towards each other along the same straight line across a frictionless, horizontal surface. Vi1 = 15.0 m/s and Vi2= -9.00 m/s, respectively. During the collision, 25% of the total initial kinetic...
9. ### Frictionless pulley and static equilibrium

1. Homework Statement Two masses are connected by a string passing over a frictionless pulley. show that for this system to remain in static equilibrium where m1 sin O (theta) > m2 that (static friction coefficient) > or = tan O - m2 / m1 sec O. 2. Homework Equations static friction...
10. ### Stunt man jumping over cars

1. Homework Statement A stunt driver sets a jump off a horizontal platform and over ten cars. The height of the platform is 1.25 m, and the total distance of the cars is 20.0 m. Find the minimum speed required to safely clear the cars. 2. Homework Equations x - x initial = velocity X...
11. ### Motion in 2D snowball problem

1. Homework Statement A snowball picks up speed and rolls of a barn roof angled at 40 degrees from horizontal. The edge of the barn is 15.0 m above the ground, and the snowball has a speed of 7.00 m/s as it leaves the roof. Ignore air effects. How far from the edge of the barn does the...
12. ### Two objects, position-time graph

1. Homework Statement At t = 0, two objects are thrown from a vertical tower of height H (in m) with an initial speed of v initial (in m/s) in opposite directions (one upwards and one downwards) so that the objects fall to the ground at the base of tower. Ignore the effects of air resistance...
13. ### Calculate the instantaneous velocity

1. Homework Statement A workman drops a wrench over the side of a high-rise building. Someone looking out their window sees the wrench appear at 11:00 a.m. Another person in an office 25.0 m below the first observer sees the wrench appear exactly 1.00 second after 11:00 AM. Calculate the...