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why is it recommended that you flex your knees and hips when lifting a heavy object rather than just flexing your hips
a horizontal spring is lying on a frictionless surface one end of the spring is attached to a wall while the other end
an archer pulls the bowstring back for a distance of 0440 meter before releasing the arrow the bow and string act like
a car is hauling 91 kilogram trailer to which it is connected by a spring the spring constant is 2400 nm the car
protons are accelerated around a ring two km in radius to speeds that approach that of light the energy for this is
the weight of block 1 sitting on a table is 422 newtonrsquos a rope tied to block 1 passes over a pulley mounted on the
compute the wavelength of the light emitted by hydrogen as predicted by the rydberg formula 1lambdar1n2- 1n2 with n4
two blocks are connected with a rope that passes of a set of pulleys one block weighs 412 newtonrsquos and the other
the mass of a hypothetical planet is 1100 that of earth and its radius is 14 that of earth if a man weights 600 newton
a dulcimer string which is supposed to vibrated at 256 hertz actually vibrates at 250 hertz does the string need to be
a woman stands on a scale in a moving elevator her mass is 60 kg and the combined mass of the elevator and scale is an
a hammer thrower accelerates the hammer mass 730 kilogram from rest within four full turns revolutions and releases it
a mountain climber in the process of crossing among two cliffs by a rope pauses to rest she weighs 555 nnbsp she is
an 83 kilogram skier starts at rest 250 meter up the side of a mountain the skier then travels down the slope until the
the tires on a new compact car have a diameter of 20 feet and are warranted for 64000 milesa evaluate the angle through
a solid conducting sphere of radius 200 cm has a charge of 790 microc a conducting spherical shell of inner radius 400
a charged particle has an initial velocity perpendicular to a uniform magnetic field now there is friction with the air
assume you doubled the mass of a clocklsquos pendulum including the rod and the weight at the end while keeping its
a 35 kilogram trunk is pushed 46 meter at constant speed up a 30 degree incline by a constant horizontal force the
while lifeguarding jenny is twirling a whistle in uniform circular motion next to herself the whistle is moving in a
a car moves horizontally with a constant acceleration of 3 ms2 a ball is suspended from the ceiling of the car by a
a one newton pendulum bob is held at an angle from the vertical by a 2 newton horizontal force f find the tension in
a 5 kilogram block is suspended from the ceiling of elevators the elevator accelerates downward at 30 ms squared
the figure 23-32 shows a closed gaussian surface in the shape of a cube of edge length 156 m it lies in a region where
a hot air balloon is ascending straight up at a constant speed of 570 ms when the balloon is 110 meter above the ground