Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A body of mass 2kg is driven by an engine delivering a constant power of 1J/s. The body starts from rest and moves in a straight line. After 9s, the body has moved a distance (in m)  ...... Option: 1 18 Optio

A body of mass 2kg is driven by an engine delivering a constant power of 1J/s. The body starts from rest and moves in a straight line. After 9s, the body has moved a distance (in m)  ......
Option: 1 18
Option: 2 9
Option: 3 27
Option: 4 36

Answers (1)

best_answer

Correct Answer: 18 

\\ P=\frac{dW}{dt}=1\\ \\ W=t\\W=\frac{1}{2}m(V_2^2-V_1^2)=t \\ \\W=\frac{1}{2}mV_2^2=t\\\\V_2=V=\sqrt{t}\\\\\frac{dx}{dt}=\sqrt{t}\\\\\int dx=\int \sqrt{t}dt\\\\ x=\frac{t^\frac{3}{2}}{\frac{3}{2}}\\ \\ for \ t=9 \ sec, x=18 m

Posted by

Deependra Verma

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JAC Chandigarh Counselling 2025: Round 1 seat allotment result out for BTech admissions
anam-khan

JoSAA round 5 seat allotment result 2025 out on josaa.nic.in
anam-khan

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today

Latest Question