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Two children hang by their hands from the same tree branch. Thebranch is straight, and grows out from the tree trunk at an angleof 27.0o above the horizontal. One child, with a mass of44.0kg, is hanging 1.30m along the branch from the tree trunk. Theother child, with a mass of 35.0 kg, is haning 2.10m from the treetrunk. What is the magnitude of the net torque exerted on thebranch by the children? Assume that the axis is located where thebranch joins the tree trunk and is perpendicular to the planeformed by the branch and the trunk
two charges are placed between the plates of a parallel plate capacitor. one charge is q1 and the other is q2 5.20
Two particles with masses 2m and 5m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the two particles in terms of vi. particle 2m
Two forces are applied to a block of mass M equal to 14 kg that sits on a horizontal, frictionless table. Find the x and y components of the second force
q1. consider a too-small space station that consists of a 3.8 m radius rotating sphere. a man standing inside is 1.9 m
A friend buys a used pickup truck that comes complete with a CB radio. However, the antenna is broken off, How long should you make the rod
A 1.80-kg rock is released from rest at a height of 18.0 m. Ignore air resistance and determine(a)the kinetic energy at 18.0 m,(b)the gravitational potential energy at 18.0 m,(c)the total mechanical energy at 18.0 m,(d)the kinetic energy at 0 m,(e)th..
The cube in fig 22.32 has sides of length L=10.0cm. The electric field is uniform, has magnitude E=4.00*10^3 N/C, find the total electric flux through all faces of the cube
a 25.0 mH inductor is in an AC-circuit with a 150 V ac-source which operates at 60.0Hz. find the inductive reactance
A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle's position as a function of time is x(t) = 50.0 cm +(2.00 cm/s)t -(.0625 cm/s^2)t^2 At what time is the turt..
An 840 kg roller coaster is launched from a giant springof constant k = 31,000 N/m on a frictionless loop-the-loop track ofradius 6.2 m. Calculate the minimum compression of the spring
car on a ramp a 1030-rm kg car is held in place by a light cable on a very smooth frictionless ramp as shown in the
A monoenergetic beam of electrons is incident on a single slit of width 0.95 nm. A diffraction pattern is formed on a screen 24 cm from the slit. what is the energy of the incident electrons
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