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Q. A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the equivalent point at t = 59 ms. (a) How far below the release point is the center of mass of the two stones at t = 440 ms? (Neither stone has yet reached ground.) (b) How fast is the center of mass of two-stone system moving at that time?
A car takes 16 s to go from v = 0 to v = 50 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
compute the tension in a string that whirls a 2kg toy in a horizontal circle of radius 2.5m when it moves at 3m/s
A parallel plate capacitor has plates of area 2.0*10^3 and plate separation 1.0*10^4m. find the capacitance of this system if air fills the volume between the plates.
A gymnast of mass 60kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
Vector A has a magnitude of 7m and makes an angle of 58o with the positive x axis. Vector B also has a magnitude of 7 m and is directed along negative x axis. Enter your answers in distance then angle (in degrees).
Find density of the object
Estimate the force P to accelerate the 80 - Ib block at 6ft/sec2 to the right.
Write down the expression that shows the pressure
Clarify how Einstein's contribution to understanding the force between the earth and the moon differed from Newton's. Include a short statement of Einstein's explanation in the answer.
How close to the edge of the 28.0 kg table, that is 2.2m with legs 1.2m apart, can a 62.0 kg person sit without tipping it over.
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
A train is travelling up a 5.0 degree incline at a speed of 2.25m/s when the last car breaks free and begins to coast without friction. a) How long does it take for last car to come to rest momentarily? b) How far did the last car travel before mo..
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