Learning Materials
Features
Discover
Chapter 9: Q. 4 (page 227)
A horizontal rope with 15 N tension drags a 25 kg box 2.0 m to the left across a horizontal surface. How much work is done by
(a) tension and (b) gravity?
a) Work done by Tension = 30 J
b) Work done by gravity = 0 J
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
A uniform solid bar with mass m and length L rotates with angular velocity v about an axle at one end of the bar. What is the bar’s kinetic energy?
A horizontal rope with 15 N tension drags a 25 kg box 2.0 m to the left across a horizontal surface. How much work is done by
(a) tension and (b) gravity?
a. How much work must you do to push a kg block of steel across a steel table at a steady speed of m/s for s?
b. What is your power output while doing so?
A -cm-long spring is attached to the ceiling. When a kg mass is hung from it, the spring stretches to a length of cm.
a. What is the spring constant?
b. How long is the spring when a 3.0 kg mass is suspended from it?
A g particle at is moving at m/s in the direction. As it moves, it experiences a force given by . What is the particle’s speed when it reaches m?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App