I need an answer for Q1 and Q2 please. Q1. Starting with Newton\'s 2nd law: mau

Question

I need an answer for Q1 and Q2 please.

Q1. Starting with Newton's 2nd law: mau = mg-h" mg-(XcopAp2 a. show that a falling object will reach a terminal speed given by: Dy D dt b. Therefore,from Qla, if we triple the frontal area A of an object of fixed shape without changing its mass, by what factor does its terminal speed change? Q2. When a falling skydiver of mass 80kg reaches his terminal speed: a. What is the force of air resistance acting on him, in Newtons? b. what is the total net force acting on him, in Newtons? c. What is his acceleration?

Explanation / Answer

2.

a)

m = mass of skydiver = 80 kg

Fg = weight of skydiver = mg

Fr = force of resistance = ?

at terminal speed

Fr = Fg

Fr = mg

Fr = 80 x 9.8 = 784 N

b)

since the speed is constant, acceleration = a = 0

Fnet = ma = 0 N

c)

a = 0

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