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A 64 kg construction worker is standing on an 18.0 kg plank. The plank is 12.5 m long and it is suspended by vertical cables at each end. If the worker stands 2.80 from the right end of the plank, what is the tension in right cable?
You are standing on a sheet of frictionless ice and throw a ball of mass 0.640 kg horizontally at a speed of 8.00 m/sec to your friend. Your mass is 75.4 kg, and your friend’s mass is 38.0 kg.
A 45kg figure skater is spinning on the toes of her skates at 1.2rev/s . Her arms are outstretched as far as they will go. What is her new rotation frequency, in revolutions per second
question 1part 1a knight of round table fires off a vat of burning pitch from his catapult at 15.2 ms at 34 above
An explosive charge imparts a velocity of 10,350 feet per second to a mortar as it exits the muzzle of mortar. If the mortar is elevated at 80 degrees what are the horizontal and vertical velocities on the mortar shell.
What is the expression for the deBroglie wavelength of the matter waves?
Suzie (of mass 68 kg) is roller-blading down the sidewalk going 48 miles per hour. What is Suzie's average acceleration
A cube of ice is taken from the freezer at -8.5°C and placed in a 104 g aluminum calorimeter filled with 309 g of water at room temperature of 20°C. What was the mass of the ice cube
Two large metal plates of area 0.5 m2 face each other. They are 4.8 cm apart and have equal but opposite charges on their inner surfaces. what is the magnitude of the charge on each plate
Imagine that we have an electron traveling due west from the capitol of the united states steps. It is traveling at 98.94% of the speed of light. What is the force on the electron from the magnetic field?
Suppose the image of an object is upright and magnified 1.69 times when the object is placed 14cm from a lens
two wooden blocks rest on an inclined plane making an angle of 30 degrees to the horizontal. the coefficient of friction between the block and plane for the first uk= 0.20, how fast is each block moving when it reaches the bottom
A drone flies 120 m at 27? North of East then turns and flies 680 m at 23? West of North, then turns again and flies 670 m due East. What is the magnitude of the drone’s displacement from its starting point?
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