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Q1. A wrecking ball (weight = 4600 N) is supported by a boom, which might be assumed to be uniform and has a weight of 3600N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°.
Q2. The Stardust spacecraft was designed to visit a comet and bring samples of its material back to the earth. The craft is 1.70 {rm m} across and has a mass of 385 {rm kg}. In January 2004, from the distance of 237 {rm km}, it took the photograph of the nucleus of comet Wild2. The distance across this nucleus is 5.0 {rm km}, and we can model it as an approximate sphere. Since astronomers think that comets have a composition alike to that of Pluto, we can assume a density the same as Pluto's, which is 2.1 {rm g/cm^3}. The samples taken will be returned to earth on Jan. 15, 2006. What gravitational force did the comet exert on the spacecraft when it took the ? Answer is F =6.29×10-5 {rm N} evaluate this force with the force that the earth's gravity exerted on it when the spacecraft was on the launch pad? A. F>mg B. Fapprox mg C. F<mg
An electron librated from a hot filament cathode is attracted by an anode with a potential of 1200V positive with respect to the filament. Compute the speed of the electron when it strikes anode.
Compute the average number of ion pairs produced along the entire paths of 12.0 MeV electrons that are brought to rest in air. Would number of ion pairs produced in soft tissue be significantly different.
A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball.
A college campus features a large fountain surrounded by the circular pool. Two students start at the northernmost point of pool and walk slowly around it in opposite directions.
The basic concepts in optics.
What is the necessary metabolic power? Hint: You can model her power needs as the sum of the power to walk on level ground plus the power needed to raise her body by the appropriate amount. Express your answer to two significant figures and include t..
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown.
How to compute the average force
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
Define the frequency components of an AM signal and draw the AM signal for the given modulation index.
Conclude the magnitude of angular acceleration
Ricardo walks 22.0 in a direction 50.0 west of north. Jane walks 20.0 in a direction 30.0 south of west. They after that stop and turn to face each other.
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