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Weight, net force, and acceleration

  • Thread starter Tastosis
  • Start date
  • #1
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Homework Statement


A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.0 kg and air resistance exerts a total upward force of 620 N on her and her parachute.
A.) What is the weight of the parachutist? B.) What is the net force? Is it upward or downward? C.) What is the acceleration (magnitude and direction) of the parachutist?


Homework Equations


Can someone tell me what's the free body diagram?


The Attempt at a Solution


I was told in my previous thread that I needed to add the forces and then use F = ma
Someone give me tips on how to go about questions A, B, and C please >.< Thanks!
 

Answers and Replies

  • #2
21
0

Homework Statement


A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.0 kg and air resistance exerts a total upward force of 620 N on her and her parachute.
A.) What is the weight of the parachutist? B.) What is the net force? Is it upward or downward? C.) What is the acceleration (magnitude and direction) of the parachutist?


Homework Equations


Can someone tell me what's the free body diagram?


The Attempt at a Solution


I was told in my previous thread that I needed to add the forces and then use F = ma
Someone give me tips on how to go about questions A, B, and C please >.< Thanks!
A) It seems sensible that this part is calculating the force due to gravity, B) and C) is doing exactly what you said under the attempt at a solution, which is Newtons second law which states,

the sum (or net) force acting on an object is equal to the product of mass and acceleration, in math terms: Fnet = m*a
 

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