What are concurrent forces? Prove that under the action of three concurrent forces F 1 ⇀ , F 2 → and F 3 → a body will be in equilibrium, when F 1 → + F 2 → + F 3 → = 0 .

Forces are said to be concurrent if their lines of forces pass through a common point. Let the three forces F 1 → , F 2 → and F 3 → be concurrent as their line of action passes through the common point 'O' as shown in the figure below. The three forces will be in equilibrium if the resultant of F 1 → and F 2 → is equal and opposite to F 3 → . The three forces are represented by O A → , O B → and O C → respectively. On completing the parallelogram O A C ' B , the diagonal O C ' represents the resultant of F 1 → and F 2 → . O C ' → represents F 1 → + F 2 → . Now for the equilibrium, O C → must be equal and opposite to O C ' → . ⇒ F 1 → + F 2 → = - F 3 → ⇒ F 1 → + F 2 → + F 3 → = 0

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ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS

G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 1: QUESTIONS

Author:G L Mittal & TARUN MITTAL

G L Mittal Physics Solutions for Exercise - G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 1: QUESTIONS

Attempt the practice questions on Chapter 9: Force : Newton's Laws of Motion, Exercise 1: QUESTIONS with hints and solutions to strengthen your understanding. ISC Physics Class XI Part 1 solutions are prepared by Experienced Embibe Experts.

Questions from G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 1: QUESTIONS with Hints & Solutions

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 3

State and explain Newton's second law of motion. Deduce the relation $F = m a$ from it.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 4

Discuss the apparent weight of a person in a lift/elevator.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 5

State Newton's second law of motion and prove that impulse is equal to the change in momentum produced.

HARD

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 6

What are inertial and non-inertial frames? Explain with the help of examples.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 7

Write the law of conservation of momentum. Derive from it Newton's third law of motion.

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>QUESTIONS>Q 8

What are concurrent forces? Prove that under the action of three concurrent forces $\overset{⇀}{F_{1}}, \vec{F_{2}}$ and $\vec{F_{3}}$ a body will be in equilibrium, when $\vec{F_{1}} + \vec{F_{2}} + \vec{F_{3}} = 0$ .