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A wrecking ball has a mass of 1100kg and it hangs on a chain that is 10m long. The wrecking ball is pulled back until the chain makes a 30oangle relative to vertical. Assume that the earth and ball are part of the system, that the ball is released from rest, and the lowest height of the ball is zero so the gravitational potential energy is zero at that point. How much kinetic energy did the ball have right before it hit the wall? What was the speed of the ball right before it hit the wall?
Please show the work and make it understandable.
Using Helmholtz coils, what is the equation that relates the current in coils of wire and magnetic field generated? What is special about the magnetic field generated by Helmholtz coils? How can this be tested?
In short-track speed skating, the track has straight sections and semicircles 16 m in diameter. What is the horizontal force on the skater
Two large parallel copper plates are 6.3 cm apart and have a uniform electric field between them as depicted in the figure 22-56. An electron is released from the negative plate at the same time that a proton is released from the positive plate.
Water pressure at the bottom of a closed 1-m-tall closed barrel is98 kPa. What is the pressure at the bottom of the barrel when a 5-mpipe filled with water is inserted into the top of the barrel?
A 42-g ball consists of a plastic spherical shell and a water-filled core. the shell has an outside diameter equal to 56.2 mm, What is the density of the plastic
A woman stands in a elevator that has a constant acelerationwhile the elevator travel upward a distance of 18.0 m. what is the mass of the woman
A fan is rotating at a rate of 710 rpm. When the motor is turned off, the blades slow to rest in 3.5 s. What is the angular acceleration of the blades as they slow down
Stars spend their time on the main sequence converting hydrogen into helium. There are two sets of reactions that can take place within a star, supporting the fusion process. Describe the two reaction chains or cycles used for hydrogen fusion and wha..
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. what is the age of the ancient site
Laser light of wavelength 509nm illuminates two identical slits, producing an interference pattern on a screen 86.5cm from the slits, Calculate the width of the slits
Suppose that the spring is ideal and that the distance by which the spring is compressed is negligible compared to H.
Calculate the linear acceleration of a car, the 0.320 m radius tires of which have an angular acceleration of 9.0 rad/s2. Assume no slippage.
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