Ask a Doubt
Request a call back

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

CBSE Class 11-science Answered

Derive an expression for displacement in the last or nth second 
Asked by Paitboy23 | 26 Jun, 2019, 05:44: AM
answered-by-expert Expert Answer
Let u be the initial velocity and a is acceleration.
 
--------------------------------------------------------------------------------------------------------------
To get velecity V after T seconds we use the formula, V = U+A×T , where A is acceleration
----------------------------------------------------------------------------------------------------------------
 
Hence velocity after (n-1) seconds = u+(n-1)×a .........................(1)
 
------------------------------------------------------------------------------------------------------------
To get displacement S after T seconds, we use the formula,  S = U×T + (1/2)×A×T2 ,
where U is initial velocity and A is acceleration
------------------------------------------------------------------------------------------------------------
 
Hence displacement Sn at nth or last second is obtained by using the intial velocity from eqn.(1) and it is given by,
 
Sn = u+(n-1)×a +(1/2)×a×1 = u+a×[ n- (1/2) ]
Answered by Thiyagarajan K | 26 Jun, 2019, 11:06: AM
Multiple Choice Questions 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 ANSWERED BY EXPERT
CBSE 11-science - Physics
.A SHM is expressed by the equation x = A cos (ωt + φ) and the phase angle φ =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 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 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 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 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 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 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 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 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 ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×