38. A puck of mass m, is tied QIC to a string and allowed Sto revolve in a circle of m1 R radius R on a friction- table less, horizontal The other end of the string passes through a small hole in the cen- m2 ter of the table, and an object of mass m2 is tied to it (Fig. P6.38) The suspended object remains in equilibrium while the puck on the tabletop revolves. Find symbolic expressions for (a) the tension in the string, (b) the radial force acting on the puck, and (c) the speed of the puck. (d) Qualitatively describe what will hap- pen in the motion of the puck if the value of m, is increased by placing a small additional load on the puck. (e) Qualita tively describe what will happen in the motion of the puck if the value of m, is instead decreased by removing a part of the hanging load Figure P6.38

38. A puck of mass m, is tied QIC to a string and allowed Sto revolve in a circle of m1 R radius R on a friction- table less, horizontal The other end of the string passes through a small hole in the cen- m2 ter of the table, and an object of mass m2 is tied to it (Fig. P6.38) The suspended object remains in equilibrium while the puck on the tabletop revolves. Find symbolic expressions for (a) the tension in the string, (b) the radial force acting on the puck, and (c) the speed of the puck. (d) Qualitatively describe what will hap- pen in the motion of the puck if the value of m, is increased by placing a small additional load on the puck. (e) Qualita tively describe what will happen in the motion of the puck if the value of m, is instead decreased by removing a part of the hanging load Figure P6.38

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter14: Fluid Mechanics

Section: Chapter Questions

Problem 14.30P: The United States possesses the ten largest warships in the world, aircraft carriers of the Nimitz...

See similar textbooks

Similar questions

A space habitat for a long space voyage consists of twocabins each connected by a cable to a central hub as shownin Figure P7.26. The cabins are set spinning around the hubaxis, which is connected to the rest of the spacecraft to generateartificial gravity. (a) What forces are acting on an astronautin one of the cabins? (b) Write Newton’s second law for anastronaut lying on the “floor” of one of the habitats, relatingthe astronaut’s mass m, his velocity v, his radial distance fromthe hub r, and the normal force n. (c) What would n have toequal if the 60.0 - kg astronaut is to experience half his normalEarth weight? (d) Calculate the necessary tangential speed ofthe habitat from Newton’s second law. (e) Calculate the angularspeed from the tangential speed. (f) Calculate the periodof rotation from the angular speed. (g) If the astronaut standsup, will his head be moving faster, slower, or at the same speedas his feet? Why? Calculate the tangential speed at the top ofhis head if he is…
A nonrotating frame of reference placed at the center of the Sun is very nearly an inertial one. Why is it not exactly an Inertial frame?
A hockey puck with mass 0.160kg is at rest at the origin on the horizontal, frictionless surfaceof the rink. At t = 0, a player applies a force of 0.250N to the puck parallel to the surface. Hecontinues to apply the force until t = 2.00s. What are the position and speed of the puck at t =2.00?
Recently, the Amazon and Virgin groups launched commercial space flights. These flights do not store fuel on board, instead, they inhale oxygen from the air. If the weight of one of these new rockets is 2420 kN, while a regular rocket is 19579 kN, what would be the acceleration of these two rockets close to the Earth's surface when a thrust of 25467 kN is applied?
NASA’s Saturn V rockets that launched astronauts to themoon were powered by the strongest rocket engine everdeveloped, providing 6.77 x 106 N of thrust while burningfuel at a rate of 2.63 x 103 kg/s. Calculate the engine’sexhaust speed.
A 63 kg astronaut drifting with 7.0 m/s to the right with respect to a spacecraft uses a jetpack to slow down. If ittakes 14.0 s to come to a stop with respect to thespacecraft, what is the force exerted by the jetpack?
scientists are experimenting with a king of gun that may eventually be used to fire payloads directly into orbit. in one test, this gun accelerates a 3.8 kg projectile from rest to a speed of 5.2 * 10^3 m/s. the net force accelarating the projectile is 2.5 * 10^5 N. how much time is required for the projectile to come up to speed?
vy chandelier with mass 125 kg is hung by chains in equilibrium from the ceilingof a concert hall as shown in Figure P5.77, with θ1 = 37.0° and θ 2 = 64.0°. Assuming thechains are massless, what are the tensions FT1, FT2, and FT3in the three chains?
If a 0.50 kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 4.2 N for a distance of 4.3 m, then what would be the block's velocity (in m/s)?
As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 17.0 m/s. In the process, he moves his hand through a distance of 1.45 m. If the ball has a mass of 0.150 kg, find the force he exerts on the ball to give it this upward speed.N
In the very Dutch sport of Fierljeppen, athletes run up to a long pole and then use it to vault across a canal. At the very top of his arc, a 55 kg vaulter is moving at 2.5 m/s and is 5.1 m from the bottom end of the pole. What vertical force does the pole exert on the vaulter?
A cube of mass ?? is initially at rest at thepeak of an inclined plane, which has a heightof 4.6 m and has an angle of θ = 25° withrespect to the horizontal. After it has beenreleased, you notice it to be travelingat v = 5.5 m/s as it leaves the ramp. What isthe coefficient of kinetic friction along theramp?