11:30 C78A 0.8 kg ball B is travelingaround in a circle of radiusT1 = 3 m with avi = 2 m/s, If the attachedcord is pulled down throughspeedthe hole with a constantspeed v, = 1 m/s at the2 m How much%3Dinstant r2%3Dwork has to be done to pulldown the cord? Neglectfriction and the size of theball.a. 0,76=3 mb. 1.66,(ra =2 m/sc. 2.40= 1.0 m/sd. 2.97e. 0.42Clear my choiceNext pageII

The component of resultant velocity:

A 0.8 kg ball B is traveling around in a circle of radius r1 = 3 m with a speed vi = 2 m/s, If the attached cord is pulled down through the hole with a constant speed v, = 1 m/s at the instant r2 = 2 m How much work has to be done to pull down the cord? Neglect friction and the size of the ball.

A 0.8 kg ball B is traveling around in a circle of radius r1 = 3 m with a speed vi = 2 m/s, If the attached cord is pulled down through the hole with a constant speed v, = 1 m/s at the instant r2 = 2 m How much work has to be done to pull down the cord? Neglect friction and the size of the ball.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter1: Introduction To Statics

Section: Chapter Questions

Problem 1.19P: Plot the earths gravitational acceleration g(m/s2) against the height h (km) above the surface of...

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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

11:30 C78
A 0.8 kg ball B is traveling
around in a circle of radius
T1 = 3 m with a
vi = 2 m/s, If the attached
cord is pulled down through
speed
the hole with a constant
speed v, = 1 m/s at the
2 m How much
%3D
instant r2
%3D
work has to be done to pull
down the cord? Neglect
friction and the size of the
ball.
a. 0,76
=3 m
b. 1.66,
(ra =2 m/s
c. 2.40
= 1.0 m/s
d. 2.97
e. 0.42
Clear my choice
Next page
II

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