Question

 An 85 kg person is parachuting and experiencing a downward acceleration of 4.5 m/s2. The

mass of the parachute is 4.0 kg.

a) (10%) Draw free body diagram.

b) (10%) What is the upward force on the open parachute from the air?

c) (10%) What is the downward force on the parachute from the person?

Answer 1

$$F_a=m(g-a)=85(9.8-4.5)=450.5\ N\\ F_p=m_p(a-g)+F_a\\=-4(9.8-4.5)+450.5=429.3\ N\\$$