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    Hi.., can anyone please tell me how to find the highest point of a ball that is thrown from a hot-air balloon that rises vertically?

    Thanks!
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    yup, usually the question gives you a few different values, either the initial speed or the time taken or etc...

    if initial speed and time is given then simply use the S=(u+v).t/2
    and plug in v as 0 as this is the speed when the ball reaches 0 speed in the air due to earths deceleration vertically up, and u as you initial speed and t as the time taken. you should get a value for S, which is the displacement, basically the height; although remember that you must add the current heaight of the hot air baloon to this value.

    If only initial speed is given, the use formula v=u+at, a is -9.8 as it is slowing down as the ball goes up, u as the initial speed, v as the 0 as the ball must come to a stop in air, and solve for t. once you find this simply put it into the formula S=(u+v).t/2 and youre done, again remember to add the current height of the baloon to the value of S.

    Hope you understood! gluck!
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    (Original post by prahuljose)
    yup, usually the question gives you a few different values, either the initial speed or the time taken or etc...

    if initial speed and time is given then simply use the S=(u+v).t/2
    and plug in v as 0 as this is the speed when the ball reaches 0 speed in the air due to earths deceleration vertically up, and u as you initial speed and t as the time taken. you should get a value for S, which is the displacement, basically the height; although remember that you must add the current heaight of the hot air baloon to this value.

    If only initial speed is given, the use formula v=u+at, a is -9.8 as it is slowing down as the ball goes up, u as the initial speed, v as the 0 as the ball must come to a stop in air, and solve for t. once you find this simply put it into the formula S=(u+v).t/2 and youre done, again remember to add the current height of the baloon to the value of S.

    Hope you understood! gluck!
    Thanks for your help!
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