0

Guest

Courses New

a partcle projected from ground moves at angle 45 degree one second after projection and speed is minimum two seconds after projection. The angle of projection of particle is (neglect the air resistance) : tan -1 (3) tan -1 (2) tan -1 (root2) tan -1 (4)

a partcle projected from ground moves at angle 45 degree one second after projection and speed is minimum two seconds after projection. The angle of projection of particle is (neglect the air resistance) :
  1. tan-1 (3)
  2. tan-1 (2)
  3. tan-1 (root2)
  4. tan-1 (4)

Grade:11

1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
9 years ago
Hello Student,

speed is minimum after 2 sec means speed=vcos theta
after 1 second
v'cos45=vcos theta
also
v'sin45-g*1=0
=>v'sin45=g
=>v'=gsqrt2
also
vsin theta-g*1=v'sin45=g
=>vsin theta=2g
=>tan theta=2g/v'cos45=2

Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty

Think You Can Provide A Better Answer ?

Other Related Questions on General Physics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More