Hotair Balloon

Hotair Balloon
Physics forum is not helping?

So here is my ? again

I dont really want the answer im trying to understand

A hotair balloonist, rising vertically with a constant speed of 5.00m/s , releases a sandbag at the instant the balloon is 40.0m above the ground. After it is released, the sandbag encounters no appreciable air drag.

Compute the position (height above the ground) of the sandbag at 0.255s after its release.

please help just tried to solve this and cant get it right :(
what does r stand for? sorry my teacher uses different variables. Here they are

X final
Xo
Vo
V final

The information that they gave you for the hot air balloonist rising at 5m/s is extra information and not necessary for your answer.

Your equations
r(t) = .5a(t)t^(2) + v(initial)t + r(initial)
v(t) = dr/dt = a(t)t + v(initial)
a(t) = dv/dt = a(t)

Given information:
r(initial) = 40m
v(initial) = 0 <-- 0 because the initial speed of the sandbag when released is 0 and not 5m/s
t = 0.255

Can you pick which equations to use from here an plug in numbers?

Edit: r(t) is the same as x(t). They both mean position.

Chasing Hot-Air Balloon!


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Hotair Balloons

Hotair Balloons

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Hot-air balloon ride over Valley of the Kings, Luxor 10/30/09


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Hotair Balloon

Hotair Balloon
Help trying to understand this question?

I dont really want the answer im trying to understand

A hotair balloonist, rising vertically with a constant speed of 5.00m/s , releases a sandbag at the instant the balloon is 40.0m above the ground. After it is released, the sandbag encounters no appreciable air drag.

so will 40m be the final position?
and 5m/s be the initial velocity?

First
Fup – Fdown = m a = 0 ; Fup = Fdown (v = cte)

Second: when sandbag is released

now Fup > Fdown, the balloon loses weight

Therefore the balloon starts speeding up and going up.

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Hotair Balloon

Hotair Balloon
am i going crazy????????????????

i keep feeling tempted to hurt/kill people!
recently i was babysitting this baby girl. well there is a gate across stairs that lead downstairs. well i took the gate away and was about to push her down the stairs, but then i realized what i was doing!

a couple of months ago i was in a hotair balloon that was high in the sky. well my brother’s friend came with us. its not that i don’ t like him, but suddenly i felt an urge to fling him over the side. i grabbed hold of him, but then my brother was like “what are you doing!?!”. i snapped out of it.

then the other day i was on a bike ride with my neighbor’s son.
well i ran my bike into his back tire and he fell. then i proceded to run over his leg, but he screamed and i stopped.

why am i getting these urges to kill/injure????
am i going crazy??? what should i do?
is it normal to find pleasure in hurting people?

Sounds to me like you are making this up. But either way, sounds like a cry for attention.

Ted’s Hot Air Balloon Part 2


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