
$f = - kx$ , the negative sign in the equation indicates
(A) this force is in same side of the force applied
(B) this force is in opposite side of the force applied
(C) this force is perpendicular side of the force applied
(D) all
Answer
125.7k+ views
Hint The force is the vector quantity that it must have both the magnitude and the direction. The value indicates the magnitude of the force and the sign indicates the direction it acts. The positive sign indicates the force is in the direction of the previous force and the negative sign indicates that the force retards or acts against the previous force.
Useful formula:
The Hooke’s law is given by
$f = - kx$
Where $f$ is the restoring force of the spring, $k$ is the spring constant and $x$ is the displacement of the spring when it is stretched.
Complete step by step answer
Let us consider the spring. The spring is considered as the elastic object and when it is stretched and released the object again moves to its original position. This concept was explained by Hooke's law. The restoring force of the spring is the product of the force applied externally and the spring constant.
$f = - kx$
When the spring is pulled, and released the restoring force of the spring causes the spring to move to its original position. Hence the restoring force acts in the opposite to that of the external force applied.
Thus the option (B) is correct.
Note: It is to be remembered that the Hooke’s law is applicable only to the certain limit. That is the stress is directly proportional to the strain only to the certain point. Above that there will be some permanent or the elongation produced. The day today's example of elasticity is the pen with the spring.
Useful formula:
The Hooke’s law is given by
$f = - kx$
Where $f$ is the restoring force of the spring, $k$ is the spring constant and $x$ is the displacement of the spring when it is stretched.
Complete step by step answer
Let us consider the spring. The spring is considered as the elastic object and when it is stretched and released the object again moves to its original position. This concept was explained by Hooke's law. The restoring force of the spring is the product of the force applied externally and the spring constant.
$f = - kx$
When the spring is pulled, and released the restoring force of the spring causes the spring to move to its original position. Hence the restoring force acts in the opposite to that of the external force applied.
Thus the option (B) is correct.
Note: It is to be remembered that the Hooke’s law is applicable only to the certain limit. That is the stress is directly proportional to the strain only to the certain point. Above that there will be some permanent or the elongation produced. The day today's example of elasticity is the pen with the spring.
Recently Updated Pages
JEE Main 2023 (April 8th Shift 2) Physics Question Paper with Answer Key

JEE Main 2023 (January 30th Shift 2) Maths Question Paper with Answer Key

JEE Main 2022 (July 25th Shift 2) Physics Question Paper with Answer Key

Classification of Elements and Periodicity in Properties Chapter For JEE Main Chemistry

JEE Main 2023 (January 25th Shift 1) Maths Question Paper with Answer Key

JEE Main 2023 (January 24th Shift 2) Chemistry Question Paper with Answer Key

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility & More

Class 11 JEE Main Physics Mock Test 2025

JEE Main Exam Marking Scheme: Detailed Breakdown of Marks and Negative Marking

JEE Main 2023 January 24 Shift 2 Question Paper with Answer Keys & Solutions

Learn About Angle Of Deviation In Prism: JEE Main Physics 2025

JEE Main 2025: Conversion of Galvanometer Into Ammeter And Voltmeter in Physics

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements

NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties of Fluids

Units and Measurements Class 11 Notes: CBSE Physics Chapter 1

NCERT Solutions for Class 11 Physics Chapter 2 Motion In A Straight Line

Important Questions for CBSE Class 11 Physics Chapter 1 - Units and Measurement
