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Huck Finn walks at a speed of 0.60 m/s across his raft (that is he walks perpendicular to the raft's motion relative to the shore). The raft is traveling down the Mississippi River at a speed of 1.70 m/s relative to the river bank (Fig 3-38). What is Huck's velocity (speed and direction) relative to the river bank?
A 50 kg uniform horizontal beam of length 3.0 m is attached toa brick wall by a bracket at the wall and a cable attached to the far end that makes an angle of 60? with thehorizontal. A 75.0 kg person stands on the beam, 1 meter away from the wall.
Which of the planets fits the following description: "a solid, cool surface, with occasional dust clouds and a thin CO2 atmosphere".
A block of mass 2.50 kg is pushed 2.40 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal. Determine the work done by the force of gravity
a stone falls from rest from the top of a cliff. a second stone is thrown downward from the same height 3.4 s later
A 7.80 grams bullet moving at 690 m/s penetrates a tree trunk to a depth of 6.40 centimeter. Use work and energy considerations to compute the average frictional force that stops the bullet
Blocks m1 = 5.7kg and m2 = 1.4kg are attached by a massless string which passes over a massless pulley. They are positioned on a frictionless ramp at angle (theta) = 32.7 degrees.
For a glass lens submerged in water (n=1.33), the critical angle of incidence at which total internal reflection begins to happen is 60.1 degrees. What is the index of refraction of the glass
Suppose a lightwave that is linearly polarized in the plane ofincidence impinges at 30degrees on a crown-glass plate (nglass=1.55) in air. Compute the appropriate amplitude reflection and transmission coefficients, and the corresponding reflectanc..
A single conservative force acts on a 5.00 kg particle within a system due to its interaction with the rest of the system. Calculate the work done by this force on the particle
In a cement mixer, cement, gravel and water are mixed by tumbling in a slowly rotating drum. Calculate the maximum angular speed for which the materials will mix
Two identical cylindrical vessels with their bases at the similar level each contain a liquid of density 0.991 g/cm3. Compute the work done by the gravitational force in equalizing the levels when the 2 vessels are connected
A person exerts a horizontal force of 190 N in the test apparatus shown in the figure. Find the horizontal force that hisflexor muscle exerts on his forearm.
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