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A traffic light of mass m1 hangs from the end of a beam of length L and mass m2, which is supported at an angle θ away from the vertical by a freely pivoting hinge at its bottom-most point and by a string pulling precisely horizontally on the beam at a distance 3/4 L from the hinge as measured along the beam. Note that in supporting the beam, the hinge has to supply a force with components in both the horizontal and vertical directions. What is the tension in the horizontal string in terms of m1, m2, g, L, and ??
two charges a and b are fixed in place at different distances from a certain spot. at this spot the potentials due to
A car traveling 82 km/h is 130 m behind a truck traveling 72 km/h. Find how long will it take the car to reach the truck
A shopper in a supermarket pushes a loaded 28 kg cart with a horizontal force of 12N. How far will the cart move in 3.5s, starting from rest.
A satellite is in an elliptical orbit at altitudes ranging from 230 to 890 km At the high point its moving at 7.23 km/s. Howfast is it moving at the low point and find the radius of acircular orbit in which the total orbital energy of the satelliteis..
A 2.40 kg object rotates around along a horizontal circle of radius r=0.720m. Obtain the centripetal acceleration and centripetal force
Light of wavelength 575 nm passes through a double-slit and the third order bright fringe is seen at an angle of 6.5° away from the central fringe. What is the separation in micrometers between the double slits
A neutron decays into a proton, and an electron. The neutron was initially at rest. What is the direction and speed of the proton
A drinking fountain projects water at an initial angle of 50 degrees above horizontal Water reaches maximum height of 0.150m above point of exit. Explain how you get velocity of water at this point
A cable lifts a 1110 kilogram elevator at a fix velocity for a distance of 39 meter. Find the work done by the tension in the cable
A 0.051 kg aluminum bullet traveling at 456 m/s strikes an armor plate and comes to a stop. What is the bullet temperature change in degrees Celsius
A 64kg human sprinter can accelerate from rest to 10 m/s in 3.0s. What is the average power output of the greyhound
Assume you doubled the mass of a clock‘s pendulum (including the rod and the weight at the end) while keeping its dimensions the same. Would the clock run fast or slow?
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