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1. 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!
2. 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!
3. (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!

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