A) \[{{v}_{B}}>{{v}_{A}}\]
B) \[{{v}_{A}}={{v}_{B}}\]
C) \[{{v}_{A}}>{{v}_{B}}\]
D) their velocities depend on their masses.
Correct Answer: B
Solution :
Ball A is thrown upwards from the building. During its downward journey when it comes back to the point of throw, its speed is equal to the speed of throw. So, for the journey of both the balls from point4to5. We can apply \[{{\text{v}}^{\text{2}}}-{{\text{u}}^{\text{2}}}\text{=2gh}\text{.}\] As u, g, h are same for both the balls, \[\,{{\text{v}}_{\text{A}}}\text{=}{{\text{v}}_{\text{B}}}\]You need to login to perform this action.
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