Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A ball of mass 0.20kg his a wall at an angle of 45

A ball of mass 0.20kg his a wall at an angle of 45^0 with a velocity of 25m/s. If the ball rebound at 90^0  to the direction of incidence Calculate change in momentum of the ball.

Answers (1)

best_answer

@Sushant

 

A ball of mass 0.20kg hits a wall at an angle of 45^0 with a velocity of 25m/s. If the ball rebounds at 90^0 to the direction of incidence Calculate change in momentum of the ball.

Solution:
Initial velocity = uCos45i + uSin45j
Final velocity = -uCos45i + uSin45j

Change in velocity = uCos45i + uSin45j - (-uCos45i + uSin45j)
= 2uCos45 i
= 2u/√2 i
= u√2 i 
= 15√2 m/s (along horizontal towards wall)

Change in momentum 
= mass * Change in velocity 
=20\times10^{-3} kg \times15?2 m/s???????
= 0.42 kgm/s 

Posted by

Pankaj

View full answer

Crack NEET with "AI Coach"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
neet_ads

Similar Questions

Trending Articles/News

anam-khan

Haryana NEET UG Counselling 2023: Stray-round registration ends today; seat allotment tomorrow
anam-khan

Bihar NEET UG Counselling 2023: Round 3 merit list out at bceceboard.bihar.gov.in
anam-khan

Rajasthan NEET UG Counselling 2023: Stray-round schedule revised; seat allotment on September 27

Latest Question