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Find the amount of work done in vertically lifting a steel beam of mass 600. kg at uniform speed through a distance of 38.0 m. Remember to identity all of your data, write the equation, and show your work.
A 70.0kg man jumps 1.00 m down onto a concrete walkway. Hisdownward motion stops in 0.0200 seconds. If he forgets tobend his knees, what force is transmitted to his leg bones
A 2.00 kg. frictionless block is attached to an ideal spring with force constant 300 n/m. At t=0 the block has velocity -4.0 m/s, what is the position of the block when its speed is 2.5 m/s
When the magnetic flux through a single loop of wire increases by 30 Tm^2, an average current of 40 A is induced in the wire. over what period of time did the flux increase
What is the magnitude of the force on an electron at a distance of 3.86 Angstrom from the thorium nucleus? What would the magnitude of the force be if the distance of the electron from thenucleus were doubled?
A certain engine can exert 75,000 kg m/sec/sec of force. Assuming that all the force is used to accelerate the vehicle on which the engine is mounted, how fast would the vehicle accelerate assuming that it masses 5,000 kg? Neglect friction/air res..
A uniform ladder is 10m long and weighs 400 N. It rests with itsupper end against a frictionless vertical wall. Its lower end rests on the ground and is preventedfrom slipping by a peg driven into the ground. The ladder makes a 30?
A inductor L is in series with a resistor R=50 ohms, and the series combination is across the 120 V rms, 60 Hz power line. If the rms voltage across the resistance R is 90 V, what is the rms inductor current?
An astronaut weighs 85 N on the Moon, where the acceleration of gravity is 1.62 m/s2. How much (in N) does she weigh on Earth
Assume a ray of light is incident on an air / material boundary at 45 degrees to the normal. What is the critical angle for the material when it is surrounded by air
a to a closed system we add 28 kj of heat while its internal energy decreases by 24 kj. how much work do we gain or
If two ends of a rope are pulled with forces of equal magnitude and opposite direction does the tension at the center of the rope must be zero? Explain?
the lowest note on a piano is a four octaves below the a given in the table. the highest note on a piano is c four
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