Dynamics Question Grade 11 Level

[kylepetten]

Homework Statement

A parachutist experiences an air friction force of 150 N and an acceleration of 7.9 m/s^2. What is the combined weight of the parachutist and the parachute?

Homework Equations

None.

The Attempt at a Solution

a= (Fg-Ff)/(m)

7.9 = (mg-Ff)/(m)

7.9 = (m(9.8)-(150N))/(m)

And that is as far as I could go. I thought I was using the right formula but I do not know for sure. Thanks.

 

[tiny-tim]

Welcome to PF!

Hi kylepetten! Welcome to PF!

A parachutist experiences an air friction force of 150 N and an acceleration of 7.9 m/s^2. What is the combined weight of the parachutist and the parachute?
…
7.9 = (m(9.8)-(150N))/(m)

And that is as far as I could go. I thought I was using the right formula but I do not know for sure. Thanks.

Looks good!

Now multiply both sides by m (hmm … why did you ever divide in the first place? ), and rearrange.

 

[kylepetten]

Hi kylepetten! Welcome to PF!


Looks good!

Now multiply both sides by m (hmm … why did you ever divide in the first place? ), and rearrange.

Thank-you for welcoming me here! I hope to be able to both get help and help people when my physics knowledge improves. And even more thanks for helping me understand this question! :) Much Appreciated.