A small mass m attached to the end of a string revolves in a circle on a frictionless tabletop. The other end of the string passes through a hole in the table (Fig. 8–62). Initially, the mass revolves with a speed v = 2.4 m/s in a circle of radius r, = 0.80 m. The string is then pulled slowly through the hole so that the radius is reduced to r, = 0.48 m. What is the speed, v,, of the mass now? FIGURE 8–62 Problem 88.

A small mass m attached to the end of a string revolves in a circle on a frictionless tabletop. The other end of the string passes through a hole in the table (Fig. 8–62). Initially, the mass revolves with a speed v = 2.4 m/s in a circle of radius r, = 0.80 m. The string is then pulled slowly through the hole so that the radius is reduced to r, = 0.48 m. What is the speed, v,, of the mass now? FIGURE 8–62 Problem 88.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Your go karts have a mass of 450kg and travel around a circular curve on a flat, horizontal track at a radius of 42 m. b) The maximum frictional force between the tyres and the road is equal to 20% of the weight of the car and driver. Calculate the coefficient of friction when an adult of mass 70kg is driving the kart. I BELIEVE THIS WOULD BE 0.02 (2DP) c) Calculate maximum angular velocity at which the car can travel round the curve at a constant radius of 42 m (NEED HELP UNDERSTANDING THE STEPS TO THIS ANSWER PLEASE?)
star, A planet orbits a star, in a year of length 2.64 x 107 s, in a nearly circular orbit of radius 1.30 x 10¹1 m. With respect to the determine (a) the angular speed of the planet. (b) the tangential speed of the planet, and (c) the magnitude of the planet's centripetal acceleration. (a) Number (b) Number (c) Number Units Units Units
During a very quick stop, a car decelerates at 12 (a) What is the angular acceleration of its 0.27 m radius tires, assuming they do not slip on the pavement? Hint: Don't forget the sign. a = S rad S² (b) How many revolutions do the tires make before coming to rest, given their initial angular velocity rad is 98 -? 3 revolutions (c) How long does the car take to stop completely? t = S
As shown below, a bullet of mass m and speed v is fired at an initially stationary sphere. The bullet goes through the sphere, and exits with a speed of. The sphere is attached to a rigid pole of 6 length L and negligible mass. What is the minimum value of v such that the sphere will barely swing through a complete vertical circle? (Use the following as necessary: m, L, g, and M for the mass of the sphere.) 12M√gl 5m v/6 Ⓡ Use conservation of energy to determine the speed of the sphere immediately after collision. Assume that at the top of the swing the sphere is momentarily at rest, so its kinetic energy is zero. Then apply conservation of momentum to find the initial minimum speed of the bullet.
A small child of mass m = 38 kg is swinging on a swing. The length from the upper bar of the swing set to the seat is L = 4.4 m. The kid is attempting to swing all the way around in a full circle. Assuming the kid is traveling at the speed found in part (a), what is their apparent weight, Wa in newtons, at the top of their path? (At the top, the kid is upside-down.)
What’s the linear speed of a point on the equator of a planet whose radius is 2.3 times that of Earth?