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Grade: 11
        
 
Q1.two balls of same mass are thrown horizontally from top of a tower in the opposite direction with velocities 3 and 4m/s. the dis. b/w walls when their velocities are mutually prependicular will be nearest to
  1. 10m
  2. 7m
  3. 5m
  4. 2.5m
5 years ago

Answers : (1)

Arun Kumar
IIT Delhi
askIITians Faculty
256 Points
							
Hello
v1=3i-gtj
v2=-4i-gtj
v1.v2=0 for 90 deg
=>-12+g^2t^2=0
=>gt=root12
=>t=root(12) /10
=>dis = 7 *root(12)/10
Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty
5 years ago
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