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A ladder of length L = 12 m and mass m = 45 kg leans against a frictionless wall. Its upper end is at height h = 9.3 m above the pavement on which the lower end rests (pavement is not frictionless). The ladder's center of mass is L/3 from the lower end. A firefighter of mass M = 72 kg climbs the ladder until her center of mass is L/2 from the lower end.
a. Draw the FBD for the ladder.
b. What are the magnitudes of the forces on the ladder from the wall and the pavement?
A mass of 0.4 kg, is connected to a spring with a spring constant of 100 N/m, What is the maximum speed of the mass and What is the energy stored in the mass/spring system when its speed is half the maximum value
A handball is thrown straight upward and is in the air for a total time of 8 s. Draw a diagram, label time and velocity every second. Compute the maximum height of the ball in meters
Tension is maintained in a string. The observed wave speed is v=22.0 m/s when the suspended mass is m=3.00 kg. What is the mass per unit length of the string
What intensity level of the horn's sound is observed by somebody waiting at an intersection 58m from the train.
A tall, cylindrical chimney falls over when its base is ruptured. Treat the chimney as a thin rod of length 55.0 m. At the instant it makes an angle of 35.0° with the vertical as it falls, what is: The radial acceleration of the top? The tangential ..
a sample of ideal gas occupies a volume of 1.5 l and is under a pressure of 300 kpa. the gas undergoes an isothermal
A hollow sphere of inner radius 7.1 cm and outer radius 9.7 cm floats half submerged in a liquid of density 510 kg/m3. Calculate the density of the material of which the sphere is made
question1a particle is uncharged and is thrown perpendicularly upward from ground level with a speed of 23.7 ms. as a
In heat transfer problems with flowing fluids, frequently the six variables, D, p, h, v, µ, k, may be combined into dimensionless groups.
Two point charges are on the y-axis. A 6.0 µC charge is located at y = 1.50 cm, and a -2.46 µC charge is located at y = -1.40 cm. (a) Find the total electric potential at the origin. (b) Find the total electric potential at the point having coordi..
As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. The spacecraft's mass is 2,525 kg and the thrust (force) of the rocket engines is 325 N. If its speed m..
For the real or imaginary nucleus of 83X^193, find the net electrical charge of the nucleus and the number of nucleons
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