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  • Two balls A and B are thrown from a building, A is thrown up and B is thrown down (both verticall

Two balls A and B are thrown from a building, A is thrown up and B is thrown down (both vertically). Let v_A and  v_B be their respective speeds when they reach the ground, then:

 

Option: 1

v_B\ >\ v_A


Option: 2

v_B<v_A


Option: 3

v_B=v_A


Option: 4

their speed depends on their quality


Answers (1)

best_answer

Ball A is launched upwards with speed u and falls downwards with speed v_A. It completes its journey to the surface under the effect of gravity.

After reaching the highest point, After reaching the highest point,A comes back to its point of projection with the same speed 'u' in the downward direction

{v_A}^2=u^2+2gh ..............(1)

Ball B starts at a falling speed 'u' and travels a vertical distance of h

{v_B}^2=u^2+2gh ........... (2)

From (1) and (2), we get:

v_B=v_A

Posted by

manish painkra

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