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Question: During your summer internship for an aerospace company, you are asked to design a small research rocket. The rocket is to be launched from rest from the earth's surface and is to reach a maximum height of 940m above the earth's surface. The rocket's engines give the rocket an upward acceleration of 16.0 m/s2 during the time T that they fire. After the engines shut off, the rocket is in free fall. Ignore air resistance. What must be the value of T in order for the rocket to reach the required altitude?
A crate weighing 574 Newton is resting on a plane inclined 33degree above the horizontal. Estimate the magnitude of the acceleration (ignore friction)
Planet X orbits the star Omega with a "year" that is 180 earth days long. Planet Y circles Omega at four times the distance of Planet X.
A 400g mass is attached to cord 1.2m in length. It is pulled to the left until the angle with the vertical is 30 degrees, and then released. What is the speed of this mass when it passes through the lowest point?
A pulley of mass 1.6 kg and radius 3.8 cm holds 2 masses: mass of A= 4.2 kg and mass of B= 7.0 kg, what is the acceleration of the system
Presume electrons move through a copper wire at speed v. Call the linear charge densities in the Earth reference frame Ep for the fixed positive ions in the wire and En for the (negative) electrons.
A point charge Qpt= 10nC is surrounded by an insulating material and stuffed inside a spgerical steel shell iwth inner radius R1=1cm and outer R0=2cm; What is the net charge of the steel shell
Suppose you are standing at the bottom of a swimming pool looking up at the surface, which we assume to be calm. Looking up, you will see a circular window to the "outer world." If your eyes are approximately1.6meters beneath the surface, what is ..
A 2kg cube of Aluminum is suspended by a rope tied to aballoon which is floating on a fluid of density 1.5x103kg/m3. What volume of the ballon is submerged in the liquid
How come in free fall you feel weightless even though gravity is pulling down on you?
For safety in climbing, a mountaineer uses a nylon rope that is 60 m long and 1.0 cm in diameter. When supporting an 88 kg climber, the rope elongates 1.80 m. Find its Young's modulus.
A magnetic fi eld is oriented at an angle = 60 degrees to the normal of a rectangular area. If the magnetic fi eld has a strength of B = 4*10^-3T, what is the area of a rectangle
The mass of an elevator plus occupants is 752 kg, The tension in the cable supporting the elevator is 8950 N. What is the unbalanced force?
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