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It has been said that it is better to lift a weight "with your legs" instead of "with your back." Which method of lifting is more efficient? Explain your answer using anatomical and kinesiology principles related to lifting.
In the figure below, two skaters, each of mass 35 kg, approach each other along parallel paths separated by 2.2 m. They have opposite velocities of 1.9 m/s each. What is the angular speed of the skaters
When a clock reads 5 seconds a cart's velocity in the positive x direction is 3 m/s. What is the magnitude (in m/s2) of the acceleration of the cart
A candle is placed 17.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
the summit of a mountain 2700m above base camp is measured on a map to be 4940m horizontally from the camp in a
A beetle and a spider are sitting on a hinged door. The beetle is in the middle of the door and the spider is near the handle, what is the angular speed and tangantial Speed of the spider
A car rounds a banked curve. The radius of curvature of theroad is R, the banking angle is ?, and the coefficient of staticfriction is µ. Determine the range of speeds the car can have without slipping up or down the road
consider an lc circuit with l.340 henrys and c.0180 farads. the capacitor is initially charged to q 76.0 millicoulombs.
Unpolarized light of initial intensity 26W/m^2 is passed through three polarizing filters polarizing filters. compute the intensity of the light after passing through all three polarizing filters
An iron anchor of density 7870 kg/m^3 appears 200 N lighter in water than in air. What is the volume of the anchor
A heat engine with a thermal e?ciency of 37% does 175J of work per cycle. How much heat is extracted from the hot reservoir per cycle
A thin rod of length 0.75m and mass 0.42kg is suspended freelyform one end. It is pulled to one side and then allowed to swinglike a pendulum, how far above that position the center of mass rises
A spherical conducting shell has 12 microcoulombs of positivecharge inside on it. The radii of the shell are r(inner)=12 cm and r (outer)=2r(inner). A particle of -4 microcoulombs is placed at the center of the shell.
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