Question

8. If the mass of a balloon is 300 kg and the lift force provided by the atmosphere is 3300 N, what

Answer 1

Answer:

Toward the north, 300 N

Explanation:

Consider the upward direction as positive and downward direction as negative.

Given:

Mass of the balloon is, $m=300\ kg$

Lift force on the balloon in the upward direction is, $F_L=3300\ N$

Take acceleration due to gravity as 10 N/kg.

Now, weight of the balloon acting downward is given as the product of its mass and acceleration due to gravity. Therefore,

Weight is, $W=mg=(300\ kg)(10\ N/kg)=-3000\ N$

Now, net force is given as the vector sum of both the forces.

$F_{net}=F_L+W\\F_{net}=3300-3000=300\ N(\textrm{Upward direction})$

The upward direction is the direction of North. So, the net force acting on the balloon is 300 N towards North.