NCERT Solutions Class 9 Science Chapter 10
NCERT Solutions Class 9 Science Chapter 10 Gravitation answers of intext questions given on Page 134 or Page 136 or Page 138 or Page 141 or Page 142 or Exercises in English Medium updated for new academic session 2020-21.
Download Class 9 Science chapter 10 UP Board Solutions in Hindi Medium also. You can download पेज 149 के उत्तर or पेज 152 के उत्तर or पेज 153 के उत्तर or पेज 157 के उत्तर or पेज 158 के उत्तर or अभ्यास के प्रश्न उत्तर in Hindi Medium free to use. NCERT Solutions Apps 2020-21 for class IX are also available for download free based on latest CBSE Syllabus 2020-2021.
NCERT Solutions Class 9 Science Chapter 10
Class: | 9 |
Subject: | Science – विज्ञान |
Chapter 10: | Gravitation |
9th Science Chapter 10 Answers in English & Hindi Medium
NCERT Solutions Class 9 Science Chapter 10 Gravitation Intext Questions and Exercise questions are given below in Hindi and English Medium updated for session 2020-21. Solutions are based on latest CBSE Books 2020-21 based on new CBSE Syllabus 2020-2021.
Class 9 Science Chapter 10 Answers in English Medium
Class 9 Science Chapter 10 Answers in Hindi Medium
Class 9 Science Chapter 10 Answers in PDF Form
- Download 9th Science Page 134 Answers
- Download 9th Science Page 136 Answers
- Download 9th Science Page 138 Answers
- Download 9th Science Page 141 Answers
- Download 9th Science Page 142 Answers
- 9th Science Chapter 10 Exercise Question Answers
- 9th Science Chapter 10 Study Material for 2020-21 in English
- 9th Science Chapter 10 Study Material for 2020-21 in Hindi
- Class 9 Science Solutions Main Page
Class 9 Science Chapter 10 Solutions Related Pages
A particular is dropped from a tower 180 m high. How long does it take to reach the ground? What is the velocity when it touches the ground?
Take g = 10 m/s².
Answer:
6 s, 60 m/s
How much would a 70 kg man weigh on moon? What will be his miss mass on earth and moon? Given g on moon = 1∙7 m/s².
119 N, 70 kg, 70 kg
Calculate the value of acceleration due to gravity on Moon. Give n mass of moon = 7.4 x 10²² kg, radius of moon = 1740 km.
1.63 m/s²
A car weighs 1200 kg. This weight is evenly distributed on 4 wheels. If the pressure in each Tyre is 15 kg wf/cm², what is the area of each Tyre in contact.
20 cm²
Why are sleeper used below the rails?
Sleeper are placed below the rails to increase area (A) and to consequently decrease pressure (P) due to weight (W) of a train on the rails as P= F/A = W/A (∙.∙ F = W). This prevents the railways line from sinking into ground.
The mass of a block made of certain material is 13.5 kg and its volume is 15 x 10-³ m³. Will the block float or sink in water? Give reason for your answer.
The block floats.
Relative density of silver is 10.8. The density of water is 10³ kg/m³. What is the density of silver in SI units?
10.8 x 10³ kg/m³
Questions for Practice on 9th Science Chapter 10
Question 1:
A boy weighing 60 kg f is wearing shoes with heel area of cross-section 20 cm² while a girl weighing 45 kg f wearing shoes with heel of area of cross-section 1.5 cm². Compare the pressure exerted on ground by their heels when they stand on the heel of one foot.
Answer 1:
The girl’s shoe heel exerts a pressure 10 times more than the boy’s shoes heel.
Question 2:
A car falls off a ledge and drops to the ground in 0.5 s. Let g = 10 m/s² (for simplifying the calculations).
(a) What is its speed on striking the ground?
(b) What is its average speed during 0.5 s?
(c) How high is the ledge from the ground?
Answer 2:
(a) 5 m/s (b) 2.5 m/s (c) 1.25 m
Question 3:
A block of wood is kept on a table top. The mass of the wooden block is 5 kg and its dimensions are 40 cm x 20 cm x 10 cm. Find the pressure exerted by the wooden block on the table top if it is made to lie on the table with its sides of dimensions (a) 20 cm x 10 cm (b) 40 cm x 20 cm. given g = 9.8 m/s².
Answer 3:
(a) 2450 Pa (b) 612.5 Pa
Important Questions on 9th Science Chapter 10
या
यदि वस्तु का भार उसके द्वारा विस्थापित जल के भार से कम या बराबर है तो वस्तु पानी में तैरेगी अन्यथा डूब जाएगी।