Question

During a parachute jump a 58 kg person opens the parachute and the total drag force acting on the person is 720 n (up). calculate the net force acting on the person

Answer 1

Answer:

The net force acting on the person is $151.02N$

Explanation:

If we want to calculate the net force acting on the person we need to sum all forces that act over the person.

There are two forces acting on the person. Its weight and the total drag force.

The total drag force has a value of 720 N and its sense is upward.

We can calculate the weight force as

$W=m.g$

Where W is the weight force

Where m is the mass of the person

And where g is the acceleration due to gravity

We are going to use

$g=9.81\frac{m}{s^{2}}$

If we calculate W ⇒

$W=m.g=(58kg).(9.81\frac{m}{s^{2}})=568.98N$

If we vectorial sum the total drag force and the weight force :

$TotalDragForce-W=720N-568.98N=151.02N$

We used a reference system where we consider the positive forces pointing upward (that is why we add a negative to the force W).

The net force acting on the person is $151.02N$

Answer 2

You can calculate the net force by using this formula

F net = F gravity - F drag

F net = 58 x 9.8 - 720

F net = -151.6  N

hope this helps