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A small block with mass .250kg is attacked to a string passing through a hole in a frictionless, horizontal surface. The block is originally revolving in a circle with a radius of .800m about the hole with a tangential speed of 4.00m/s. The string is then pulled slowly from below , shortening the radius of the circle in which the block revolves. The breaking strength of the string is 3.00 N. What is the radius of the circle when the string breaks?
A 10.0 kg ball rests suspended by the 5.0 m long weightless string. find The maximum deflection angle for the large ball
the escape velocity of a bullet from the surface of planet y is 1631 ms. calculate the escape velocity from the surface
the electron in a hydrogen atom is infintely distant at zero potential energy and is at an average radius of a0=.0529 nm when bound by 13.6 eV. find the nearest principal quantum number in this state
A 50.0-kg child stands at the rim of a merry-go-round of radius 1.70 m, rotating with an angular speed of 2.95 rad/s. What minimum coefficient of static friction is required
What is the largest index of refraction that the liquid can have, such that none of the light is transmitted into the liquid and all of it is reflected back into the solid
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. What is the mass of the faster locomotive
A tall tree is growing across a river from you. You would like to know the distance between yourself and the tree,as well as its height, but are unable to make the measurements directly. How far away is the tree
In outer space a rock of mass 12 kg is acted on by a constant net force ‹ 30, ?14, 49 › N during a 3 s time interval. What was the rock's velocity at the beginning of the time interval
a uniform electric field exists between two conducting plates separated by 1.9 mm. a dust grain with charge 65 nc nano
q1. james is scheduled for a job interview with ms. farrar. he knows that she is in charge of selecting placing and
Playing near a road construction site, a child falls over a barrier and down onto a dirt slope that is angled downward at 42° to the horizontal, What is the coefficient of kinetic friction between the child and the slope
You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}..
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