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A roller-coaster car may be represented by a block of mass 50.0 kg. The car is released fromrest at a height h = 45.0 m above the ground and slides along africtionless track. The car encounters a loop of radius R = 15.0 mat ground level, as shown. As you will learn in the course of this problem, the initial height 45.0 m is great enough so that the carnever loses contact with the track. Find an expression forthe kinetic energy K of the car at the top of the loop. Find the minimum initial height at which the car can be released that still allows the car to stay in contact with the track at the top of the loop.
a container of ideal gas for which the thermal energy is given by eth 2.6 n r t is initially at pressure pi 1.1 x
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. how fast is the student going at the bottom of the slide
A stone of weight W has specific gravity 2.51. When the stone is suspended from a scale and submerged in water, what is the scale reading in terms of its weight in air
As you get ready for your early morning physics class, you comb your hair in front of a planar mirror. How far away from you is your image
Consider light with an initial intensity, I0. Calculate the fraction of light that gets through the following setups: (a) A single polarizer, (b) Two polarizers with their transmission axes 30 degrees apart
If an object is placed 0.820cm from the objective lens, calculate the distance between the lenses when the microscope is adjusted for a relaxed eye
Show that with equal values for the object and image distances (Do=Di), they must both be equal to twice the focal length: Do=Di=2f. What is the predicted magnification
consider a common mirage formed by super-heated air just above a roadway. a truck driver whose eyes are 2.00 m above
a 1.53 kg particle with velocity 9.44 ms - 4.84 ms is at x 1.03 m y 6.67 m. it is pulled by a 2.10 n force in the
an electron is moving at a particular instant parallel to a wire with a speed of 3 times 105 ms. the wire carries a
A proton travels with a speed of 4.90 106 m/s at an angle of 57° with the direction of a magnetic field of magnitude 0.160 T in the positive x-direction. determine the magnitude of the magnetic force on the proton
a diving bell in the shape of a cylinder with height 2.5m is closed at upper end and open at the bottom. its lowered
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