Ask a Doubt

Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

A body with uniform acceleration covers 76 m in 5th second and 116 m in 10th second. (a)Find the distance traveled in 15th second. (b) What is the distance traveled in next 5 seconds?

Asked by Mãnï kåûr | 02 Aug, 2019, 05:09: PM

Expert Answer

Let u is initial velocity and a is acceleration for the given motion

initial velocity for nth second travel is obtained from the formula " v = u+at " by considering time duration t =1

Distance travelled at nth second is obtained from the formula, " S = ut+(1/2)at² " by considering appropriate initial velocity and time duration t = 1

For the 5^th second travel, initial velocity u+4a, hence distance S₅ travelled in 5^th second ,

S₅ = ( u+4a )+ (1/2)a = 76 or u + (9/2)a = 76 m ..................... (1)

For the 10^th second travel, initial velocity u+9a, hence distance S₁₀ travelled in 10^th second ,

S₁₀ = ( u+9a )+ (1/2)a = 116 or u + (19/2)a = 116 m..................... (2)

By solving eqn.(1) and eqn.(2), we get u = 40 m/s and a = 8 m/s²

Distance S₁₅ travelled in 15^th second ,

S₁₅ = ( u+14a )+ (1/2)a = [40+ (14×8)]+(1/2)×8 = 156 m

Distance S travelled in next 5 seconds, S = (u+15a)×t +(1/2)at² = [40+(15×8)]×5 + (1/2)×8×25 = 900 m

Answered by Thiyagarajan K | 03 Aug, 2019, 09:47: AM

Practice Test

Answered Unanswered My Questions My Answers

CBSE 11-science - Physics

answer me

question image

Asked by sheikhsaadat24 | 17 Apr, 2024, 09:41: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

.A SHM is expressed by the equation x = A cos (Ït + Ï) and the phase angle Ï =0. Draw graphs to show variation of displacement, velocity and acceleration for one complete curve in SHM.

Asked by sy123946 | 07 Apr, 2024, 04:23: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

the dimension of stopping potential vo in photoelectric effect in units of plank's constant 'h',speed of light 'c' and gravitational constant 'G' and ampereA

Asked by derhebha955 | 03 Apr, 2024, 09:03: AM

ANSWERED BY EXPERT

CBSE 11-science - Physics

In this que while solving it we take D F of alpha =D.F of beta.Why is it so?

question image

Asked by sumedhasingh238 | 29 Mar, 2024, 05:15: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

In physics if 2 quantities are dimensionless then their dimensional formula are equal?

Asked by sumedhasingh238 | 28 Mar, 2024, 11:10: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

7. State the relation between maximum range and maximum height of the projectile if the angle of projection is 45 deg

Asked by roshnibudhrani88 | 23 Mar, 2024, 05:52: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

The second overtone of a pipe closed at one end has the same frequency as the third overtone of a pipe open at both ends. Compare the length of the pipes

Asked by emad.amd | 21 Mar, 2024, 12:00: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

two forces whose magnitude are in the 3:5 give a resultant f Jatio 3:5 give 20 N. If fac 20. It fue angle of thread indination of each face find Magnitude

question image

Asked by vinitdubey7735 | 14 Mar, 2024, 11:21: AM

ANSWERED BY EXPERT

CBSE 11-science - Physics

Q17. The velocity time relation of an electron starting from rest is given by v = kt where k = 6m / (s ^ 2) Calculate the distance traversed in 2 sec. 122

Asked by om636694 | 04 Mar, 2024, 09:10: PM

ANSWERED BY EXPERT

CBSE 11-science - Physics

pressure of a gas in a closed cylinder is expressed in the following manner p=pa+hpg identity the expression for absolute pressure and gauge pressure

Asked by rajuinwati12 | 04 Mar, 2024, 09:22: AM

ANSWERED BY EXPERT

My Class Videos Tests Plans Ask a Doubt

Get Latest Study Material for Academic year 24-25 Click here

×