+91-87964 74404
FlagBACK
Question icon
Grade 12th passIIT JEE Entrance Exam

A Man throws balls with the same speed vertically upwards one after the other at an interval of 2 second . What should be the speed of the throw so that more than two balls are in the sky at any time ( Given g 9.8 m/s^2 )
1. More than 19.6 m/s
2. At least 9.8 m/s
3. Any speed less than 19.6 m/s
4. Only with speed 19.6 m/s

Profile image of Tanvir Alam
7 Years agoGrade 12th pass
Answers icon

1 Answer

Profile image of Rahul Rathore
7 Years ago
More than 19.6 m/s
Two balls should be in Air ,we can consider that at t=2 1st ball will be at max height v=0 
Applying the eq  we get answer more than 19.6m/s

Other Related Questions on iit jee entrance exam

question mark

Let S={x:x belongs to R(√3+√2)^(x^2-4) - (√3-√2)^(x^2-4)=10}. Then n(S) is equal to-

iit jee entrance exam
1 Answer Available

Last Activity: 9 Months ago

question mark
My rank is 29k, General, should I opt for any state college cse branch or some Nits in which in which I am getting ECE , chemical, mechanics etc....
 
iit jee entrance exam
1 Answer Available

Last Activity: 3 Years ago

question mark
How is Ranquer Eduzone,comparing, Akash,Fitjee,Resonance,Naryana
iit jee entrance exam
1 Answer Available

Last Activity: 3 Years ago

question mark
Can class 9th students study syllabus class  of 11th 
iit jee entrance exam
3 Answers Available

Last Activity: 4 Years ago

question mark
Sum of series 2[n/2] ! [n/2]!/ n! [2Co-2C2+3C2....+[-1]^n[n+1]2Cn] where n is an even positive integer. Kindly provide solution of this question and how to generalise this. How do we know that which expansion will give this?
iit jee entrance exam
1 Answer Available

Last Activity: 4 Years ago