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A uniform 0.25-kilog thin rod that has an 80-centimeter length is free to rotate about a fixed horizontal axis perpendicular to and through one end ram of the rod. It is held horizontal and released. Instantly after it is released,
(a) Determine the acceleration of the center of the rod, and
(b) Find the initial acceleration of the free end of the rod?
(c) Calculate the speed of the center of mass of the rod when the rod is (momentarily) vertical?
What horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer.
IO is a moon of jupiter, with a mass M= 8.9X10^22 kg, and radius of 1820Km. What period will this satellite have
An automobile weighing 2000lbs travels due west at a constand speed of 70 mph. The magnetic field in the area is a constant 2.5 µT due north. What is the normal force on the car
A billiard ball moving at 1.5 m/s in the x direction collides with an identical ball initially at rest. after the collison one ball moves off at 45 degrees above the x axis. find both balls post collision velocities
a physics teacher performing an outdoor demonstration suddenly falls from rest off a high cliff and simultaneously
A 1500 kg car is driven onto a pair of ramps so that it fronts wheels have been raised 0.3 m above the rear wheels. How much of the car's weight is supported by the rear wheels
a softball having a mass of 0.40 kg is pitched horizontally at 120kmh . by the time it reaches the plate it may have
A person with a digital camera uses a lens of focal length 15.0mm to take a photograph of the image of a 1.40cm -tall seedling located 9.80cm behind a double-convex lens of 17.0cm focal length
A mass m is connected to the bottom of a vertical spring whose force constant is k. Attached to the bottomof the mass is a string that is connected to a second mass m, as shown in the figure.
q1. the frequency of an opera singer is 450 hz. assume the speed of sound in air is 340 ms. what is the frequency heard
An ideal gas expands at a constant pressure of 2.1 atm from 457 mL to 713 mL. Heat then flows out of the gas, at constant volume, What is the total heat flow into the gas
A ball having amass of 150 g strikes a wall with aspeed of 4.8 m/s and rebounds withonly 50% of its initial kinetic energy. What is the magnitude of the impulse on the wall from the ball
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