Posted by applebottom on Saturday, October 30, 2010 at 9:12pm.
A hotair balloon has a total mass of 720 kg. It accelerates downwards (towards the ground) at 2.7m/s^2 even though an upwards lift force in acting on it.
Find
a:Find the lift force acting on the balloon
B)What must be the total mass that needs to be thrown overboard if the operator on the hotair balloon decides to accelerate upwards at 3.6 m/s^2 ?
Assume the upwards lift force remains the same.

Physics  bobpursley, Saturday, October 30, 2010 at 9:50pm
net force=ma
liftmg=ma but a=2.7
solve for lift.

Physics  Henry, Sunday, October 31, 2010 at 7:53pm
a. We'll call downward acceleration
(), and upward (+).
a + g = 2.7 m/s^2,
a  9.8 = 2.7,
a = 2.7 + 9.8 = 7.1 m/s^2.
F = ma = 720 kg * 7.1 m/s^2 = 5112 N.
b. a + g = 3.6 m/s^2,
a  9.8 = 3.6,
a = 3.6 + 9.8 = 13.4 m/s^2.
F = ma = 5112 N,
m * 13.4 = 5112,
m = 5112 / 13.4 = 381.5 kg, max.
m = 720  381.5 = 338.5 kg to be thrown overboard.
Answer This Question
Related Questions
 Chemistry  The total mass that can be lifted by a balloon is given by the ...
 Chemistry  The total mass that can be lifted by a balloon is given by the ...
 physics  Several people are riding in a hotair balloon. The combined mass of ...
 physics  Several people are riding in a hotair balloon. The combined mass of ...
 physics  Several people are riding in a hotair balloon. The combined mass of ...
 PHYSICS  Several people are riding in a hotair balloon. The combined mass of ...
 physics  a hot air balloon rise above the ground, accelerating upwards at a ...
 Physics  An empty rubber balloon has a mass of 0.012kg. the balloon is filled ...
 Physics  An empty rubber balloon has a mass of 0.0120 kg. The balloon is filled...
 physics, math  A hot air balloon with a mass of 18.0 kg is accelerating upward ...
More Related Questions