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A boy weighing 3.9 102 N jumps from a height of 1.80 m to the ground below. Assume that the force of the ground on his feet is constant.
(a) Compute the force of the ground on his feet if he jumps stiff-legged, the ground compresses 2.10 cm, and the compression of tissue and bones is negligible.
(b) Compute the force his legs exert on his upper body (trunk, arms, and head), which weighs 2.50 102 N, under the conditions assumed above.
(c) Now suppose that his knees bend on impact, so that his trunk moves downward 44.0 cm during deceleration. Compute the force his legs exert on his upper body.
A compound microscope has an objective lens of focal length 10.3 mm with an eyepiece of focal length 15.0 mm, What is the overall magnification of this microscope
Write the Lagrangian for a particle of mass m constrained to move on an inclined plane whose angle with respect to the horizontal is θ and derive the equation(s) of motion from Lagrange’s equation(s).
A 2 kg object is dropped and falls 20m, at which point it is caught and a net force of 100N is exerted on the object. How much time did the object take to fall
A popular pastime is to see who can push an object closest to the edge of a table without its going off. If the coefficient of kinetic friction is 0.400, what was the object's speed as you released it
a 80 kev x-ray undergoes a compton scattering with an electron of tungsten and ejects this electron with energy 15ev.
Boat sails at a rate of 5.0 m / s relative to the sea. He is aiming directly north, What will be the direction of the boat
Calculate the total time for car A to travel the 15.0 m and after the collision, car B moves to the right at a speed of 4.8 m/s. Calculate the velocity of car A after the collision.
A copper flask with a volume of 80 cm^3 is filled to the brim with olive oil. If the temp of the system is increased from 8C to 52C, how much oil spills
a solid metal sphere of radius 3.00 m carries a total charge of -3.00 microc. what is the magnitude of the electric
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106. One pulse is delivered every time the fully charged capacitor loses 60.5% of its ..
Not sure how to relate 'bandwidth' to wc+wm and wc-wm (w =omega = angular frequency) ie upper and lower sideband. We know audio range max is 20 kHz, how do we get band width from this data
Once free of this area, it speeds up to 13 m/s in 8 {rm s}. At the edge of town, driver again accelerates, with the same acceleration, for another 16 {rm s} to reach a higher cruising speed.
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