Ask a Doubt
Request a call back

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

CBSE Class 11-science Answered

To find minimum velocity.
Asked by Harshal Saptarshi | 05 Sep, 2010, 11:15: PM
answered-by-expert Expert Answer
In X direction, acceleration a = 0
Distance traveled, sx = uxt + 0 = uxt = 3 (given)
                          ux = 3/t.............................................................. equation 1
 
In Y direction, acceleration = -10 m/s2
Distance traveled, sy = uyt + (at2)/2 = uyt - (10t2)/2 = uyt -5t2 = 4 (given)
                          uy = (4 + 5t2)/t....................................................equation 2
 
Now velocity u = √(ux2 + uy2) = √[(3/t)2 + ((4+5t2)/t)2] = √[(25/t2) + (25t2) + 40]...equation 3
 
For min vel, differentiate equation 3 with respect to time and equate to zero.
this gives t = 1.
 
Putting t = 1 in equation (1) and (2), 
 ux = 3
 uy = 9
 
u = √(ux2 + uy2) = √(32 + 92) = 3√10.
 
Here's your answer.
Answered by | 06 Sep, 2010, 11:28: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
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
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
A platform is moving upwards with an acceleration of 5m/s².At the moment when it's velocity is 3m/s, a ball is thrown from it with a speed of 30m/s w. r. t platform at an angle of 30 with horizontal w. r. t plat form. What is the time taken by the ball to return to the platform
Asked by shailajakandikatla19 | 18 Jan, 2024, 06:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
please provide complete solution
question image
Asked by dhanshreekansyakar | 09 Jan, 2024, 11:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A×B where A= 2i-3j-k and B =i+4j-2k
question image
Asked by banhisikhapanda49 | 07 Nov, 2023, 10:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
in a vertical circle of radius r at what point in its path a particle may have tension equal to zero
Asked by momintaufik26 | 13 Oct, 2023, 08:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
clear my doubt
question image
Asked by anshujaiswalname | 10 Sep, 2023, 01:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
clear my doubt
question image
Asked by subhashreeojha235 | 20 Jul, 2023, 11:22: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
1.State paralogram law of vector addition and derive magnitude and the direction of a resultant vector  
Asked by preethiprithivi05 | 21 Feb, 2023, 09:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A particle is projected from a point P with a velocity v at an angle θ with horizontal. At a certain point Q it moves at right angles to its initial direction. Then (a) velocity of particle at Q is vsintheta (b) velocity of particle at Q is Vtantheta (c) time taken from P and Q is v/g sin theta (d) time taken from P and Q is v/gsectheta
Asked by hy9022075 | 11 Jan, 2023, 05:06: PM
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
×