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 BULLET FIRED INTO A BLOCK LOSES HALF ITS VELOCITY AFTER MOVING 0.9m BEFORE IT COMES TO REST, DISTANCE TRAVELLED WOULD BE ? ITS MCQ OPTIONS ARE 1.2m 0.8m 2.0m 1.6m
Asked by shreya | 27 Oct, 2013, 08:35: PM
answered-by-expert Expert Answer
The bullet loses half its velocity after penetrating 0.9 m into the target.
Let us say that the gun fires the bullet with force F.
 
The work done by the gun goes as change in kinetic energy of the bullet.
 
Thus, work done after penetrating 0.9 m inside the target is
 
F × (0.9 m) = ½mv2 - ½m(v/2)2 = 3/8 mv2
 
Thus, we have
 
mv2 = 2.4F
 
Now, when the bullet penetrates further distance x, the entire kinetic energy is lost. Thus, we have
 
F × (0.9 + x m) = ½mv2
 
Thus, the total distance S penetrated by the bullet inside the target is,
 
Answered by Romal Bhansali | 28 Oct, 2013, 10:03: AM

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
×