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A 49 kg woman leaps vertically from a crouching position in whichher center of mass is 36 cm above the ground. As her feet leave the floor her center of mass is 72 cm above the ground; it rises to 113cm at the top of her leap. (a) As she is pressingdown on the ground during the leap, what is the average magnitude of the force on her from the ground? (b) What maximum speed does she attain?
A 3.7cm x 5.8cm rectangle lies in the xz-plane, What is the electric flux through the rectangle if E = (80i + 70j) N/C
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 50.0 deg. Find the angle the resultant force makes with the rope of dog A
a block is pushed across a rough horizontal surface by a horizontal force of magnitude P= 25 . The coefficient of kinetic friction between the block and the ground is 0.3 if the blck started from rest
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the final speed of an electron released from rest at the negative plate
In a tungsten atom, what is the kinetic energy of an L-shell electron ejected by a photon that was created during the M-K shell transition of the atom?
please write down the general wave equation in fluid and solid. show the simple solution of the wave equations and
Nichrome wire of cross-sectional radius 0.788 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
You operate a small grain elevator near Champaign, Illinois. One of your silos uses a bucket elevator that carries a full load of 800 kg through a vertical distance of 40 m. (A bucket elevator works with a continuous belt, like a conveyor belt.)
The Zacchini family was renowned for their humancannonball act in which a family member was shot from a cannon using either elastic bands or compressed air. what was the magnitude of the force propelling him
Three point masses each of mass m are connected by two thin rods each of mass M and length L. The central mass is at an origin and the z-axis is directed out of the page.
A 1200 kg car coasts in neutral down a 2.0° hill. The car attains a terminal speed of 23.0 m/s. How much power must the engine deliver to drive the car on a level road at 23.0 m/s
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 660N on the earth, what would be your weight on the surface of a neutron star that has the same mass as ..
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