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# a body dropped from top of tower covers a distance 7x

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## A body dropped from the top of a tower covers a distance 7 x in the last second of its journey where X is the distance covered in first second. How much time does it take to reach the ground Take g =10 m / s 2 ? A. 3 sB. 4 sC. 5 sD. 6 s

A body dropped from the top of a tower covers a distance 7 x in the last second of its journey where X is the distance covered in first second. How much time does it take to reach the ground Take g =10 m / s 2 ? A. 3 sB. 4 sC. 5 sD. 6 s

Byju's Answer Standard XII Physics Dropping Objects A body droppe... Question

A body dropped from the top of a tower covers a distance

7 x

in the last second of its journey where

x

is the distance covered in first second. How much time does it take to reach the ground (Take

g = 10 m / s 2 )? A 3 s B 4 s C 5 s D 6 s Open in App Solution

The correct option is B

4 s

In first second, distance travelled

x = 1 2 × g × t 2 = 5 m (for g = 10 m / s 2 )

Distance travelled in last second

= 7 x = 35 m We know that S n = u + 1 2 a ( 2 n − 1 ) or 35 = 0 + 10 2 × ( 2 n − 1 ) ⇒ n = 4 ∴ t = 4 s Suggest Corrections 26

SIMILAR QUESTIONS

Q. A body dropped from the top of the tower covers a distance

7 x

in the last second of its journey, where

x

is the distance covered in first second. How much time does it take to reach the ground ? (in seconds)

Q. A body dropped from the top of a tower covers a distance

7 x

in the last second of its journey, where

x

is the distance covered in the first second. How much time does it take to reach the ground?

Q. A body dropped from the top of a tower covers the distance

7 x

in the last second of its journey, where

x

is the distance covered in

1 st

sec. How much time does it take to reach the ground ?

Q. A body dropped from the top of a tower covers a distance

7 h

in the last second of its journey where h is the distance covered in the first second. How much time does it take to reach the ground?

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स्रोत : byjus.com

## A body dropped from the top of the tower covers a distance 7x in the last second of its journey, where x is the distance covered in first second. How much time does it takes to reach the ground?

Click here👆to get an answer to your question ✍️ A body dropped from the top of the tower covers a distance 7x in the last second of its journey, where x is the distance covered in first second. How much time does it takes to reach the ground?

Question

A

B

C

D

## 6 s

Medium Open in App

Updated on : 2022-09-05

Solution Verified by Toppr

Correct option is B)

∵d=

2 1 ​ gt 2

Therefore distance covered in 1

st second is = 2 1 ​ g

Let it fall for n sec

∴7x=0+ 2 g ​ (2n−1) ⇒7× 2 g ​ = 2 g ​ (2n−1)⇒2n=8⇒n=4 s Video Explanation

Solve any question of Motion in a Straight Line with:-

Patterns of problems

>

179 21

स्रोत : www.toppr.com

## A bolldropped from the top of a tower covers a distance 7x in the last second of its journey, where x is the distance coverd int the first second. How much time does it take to reach to ground?.

Given 7x=(g)/(2) (2n-1) and x(1)/(2)g(1)^(2). Solving these two equations, we get n=4 s.

A bolldropped from the top of a tower covers a distance

7 x

in the last second of its journey, where

x

is the distance coverd int the first second. How much time does it take to reach to ground?.

CENGAGE PHYSICS-KINEMATICS-1-SINGLE CORRECT

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Updated On: 27-06-2022

Text Solution A 3 s B 4 s C 5 s D 6 s Answer

Solution Given 7 x = g 2 ( 2 n − 1 ) and x 1 2 g ( 1 ) 2 .

Solving these two equations, we get

n = 4 s . Answer

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

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एक ऊंची मीनार की चोटी से एक गेंद विरामावस्था से छोड़ दी जाती है । गेंद पहले सेकण्ड में

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एक वस्तु को मीनार के शीर्ष से गिराया जाता है। वह अपनी यात्रा के अन्तिम सेकण्ड में 7x दूरी तय करती है। जहाँ x प्रथम सेकण्ड में तय की गई दूरी है तो पृथ्वी पर पहुँचने में इसे कितना समय लगेगा?

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Mohammed 10 day ago

Guys, does anyone know the answer?