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Physics Part-I

Laws of motion

Ten one-rupee coins are put on top of each other on a table. E

Physics Part-I

Class 11

NCERT

Chapter 1: Physical World

16 questions

Chapter 2: Units and Measurements

51 questions

Chapter 3: Motion in Straight Line

50 questions

Chapter 4: Motion in a Plane

43 questions

Chapter 5: Laws of motion

52 questions

A stream of water flowing horizontally with a speed of

15

m s^{- 1}

gushes out of a tube of cross-sectional area

1 0^{- 2}

m^{2}

, and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assug it does not rebound ?

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass

m

. Give the magnitude and direction of

(a) The force on the

7^{t h}

coin (counted from the bottom) due to all the coins on its top.

(b) The force on the

7^{t h}

coin by the eighth coin.

6^{t h}

coin on the

7^{t h}

coin.

An aircraft executes a horizontal loop at a speed of

720 km / h

with its wings banked at

1 5^{0}

. What is the radius of the loop?

View all question

Chapter 6: Work, Energy and Power

41 questions

Chapter 7: System of Particles and Rotational Motion

45 questions

Chapter 8: Gravitation

33 questions

Question

Easy

Solving time: 2 mins

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass $m$ . Give the magnitude and direction of
(a) The force on the $7^{t h}$ coin (counted from the bottom) due to all the coins on its top.
(b) The force on the $7^{t h}$ coin by the eighth coin.
(c) The reaction of the $6^{t h}$ coin on the $7^{t h}$ coin.

Name: Video solution 1: [Solved] Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. Give the magnitude and direction of(a) The force on the 7th coin (counted from the bottom) due to all the coins on its top.(b) The force on the 7th coin by the eighth coin.(c) The reaction of the 6th coin on the 7th coin. - Physics Part-I
Uploaded: 2023-05-24T04:45:50.000Z
Duration: 6 min
Description: Video solution 1: [Solved] Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. Give the magnitude and direction of(a) The force on the 7th coin (counted from the bottom) due to all the coins on its top.(b) The force on the 7th coin by the eighth coin.(c) The reaction of the 6th coin on the 7th coin. - Physics Part-I

Views: 6,107 students

Updated on: May 24, 2023

Book:

Physics Part-I (NCERT)

Found 4 tutors discussing this question

Levi Discussed

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass

m

. Give the magnitude and direction of

(a) The force on the

7^{t h}

coin (counted from the bottom) due to all the coins on its top.

(b) The force on the

7^{t h}

coin by the eighth coin.

6^{t h}

coin on the

7^{t h}

coin.

13 mins ago

Discuss this question LIVE

13 mins ago

Text solutionVerified

(a) Force on the seventh coin is exerted by the weight of the three coins on its top.Weight of one coin = mg
Weight of three coins = 3mg
Hence, the force exerted on the 7th coin by the three coins on its top is 3mg. This force acts vertically downward.

(b) Force on the seventh coin by the eight coin is same as the Force on the 7th coin due to top three coins.

(c) The 6th coin experiences a downward force because of the weight of the four coins (7th, 8th, 9th, and 10th) on its top.
Therefore, the total downward force experienced by the 6th coin is 4mg.
As per Newtons third law of motion, the 6th coin will produce an equal reaction force on the 7th coin, but in the opposite direction. Hence, the reaction force of the 6th coin on the 7th coin is of magnitude 4mg. This force acts in the upward direction.

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Practice more questions from Physics Part-I (NCERT)

A stream of water flowing horizontally with a speed of

15

m s^{- 1}

gushes out of a tube of cross-sectional area

1 0^{- 2}

m^{2}

, and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assug it does not rebound ?

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass

m

. Give the magnitude and direction of

(a) The force on the

7^{t h}

coin (counted from the bottom) due to all the coins on its top.

(b) The force on the

7^{t h}

coin by the eighth coin.

6^{t h}

coin on the

7^{t h}

coin.

An aircraft executes a horizontal loop at a speed of

720 km / h

with its wings banked at

1 5^{0}

. What is the radius of the loop?

View all

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Question Text	Ten one-rupee coins are put on top of each other on a table. Each coin has a mass $m$ . Give the magnitude and direction of (a) The force on the $7^{t h}$ coin (counted from the bottom) due to all the coins on its top. (b) The force on the $7^{t h}$ coin by the eighth coin. (c) The reaction of the $6^{t h}$ coin on the $7^{t h}$ coin.
Updated On	May 24, 2023
Topic	Laws of motion
Subject	Physics
Class	Class 11
Answer Type	Text solution:1 Video solution: 1
Upvotes	145
Avg. Video Duration	6 min

Text solutionVerified

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Text solutionVerified

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