Question

Pls help answer embed
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Answer 1

C = 1.01

Step-by-step explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass,
`v_t=60\ m/s`

Area of cross section,
`A=0.33\ m^2`

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

Weight of the object = drag force

R = W

or

`(1)/(2)\rho CAv_t^2=mg`

Where

`\rho` is the density of air = 1.225 kg/m³

C is drag coefficient

So,

`C=(2mg)/(\rho Av_t^2)\\\\C=(2* 75* 9.8)/(1.225* 0.33* (60)^2)\\\\C=1.01`

So, the drag coefficient is 1.01.