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After going through a bad break-up with your significant other you end up drinking half a case of beer. The next day you decide the cloud of despair must be fought with exercise. How much longer will it take you to burn off the calories of the beer if you walk at 5 km/h versus if you run at 15 km/h? (Assume your mass is 68 kg). It shouldn't matter how many calories were consumed or how long the person walked or ran, we are just making a comparison of burning calories while exercising at 5km/h and 15km/h.
A 1560kg car is travelling with a speed of 14.20 m/s. What is the magnitude of the horizontal net force that is required to bring car to a halt in a distance of 52.10 m.
A stone is dropped from the roof of a building; 2.10s after that a second stone is thrown straight down with the initial speed of 18 m/s, and both stones hit the ground at the equal time. How long did it take for the first stone to hit the ground.
A 500 g block slides along a frictionless surface at a speed of 0.35m/s .it runs into a horizontal mass less spring with spring constant 50N/m that extends outward from a wall.
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
Find the frictional torque, which is assumed to be constant. Find the moment of inertia of the wheel.
Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B?
A 5.00 X 10-2 kg mass with a charge of +0.75 mC is hung by a thin insulated thread. A charge of -0.9 mC is held 0.15 meters directly to right so that the thread makes an angle q with the vertical. What is the angle q and the tension in the string.
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. The maximum speed of the object is 1.25m/s.
A simple harmonic oscillator consists of a block of mass 4.kg attached to a spring of spring constant 153 N/m. When t = 2 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
Two small insulating spheres with radius 9×10-2 are separated by a large center-to-center distance of 0.52. One sphere is negatively charged.
With what tension should a rope with length 3.00m and mass 0.135kg be stretched for transverse waves of frequency 43.0Hz to have a wavelength of 0.720m. What torque does friction exert even as this wheel is slowing down.
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