Question

A 0.30 kg bird flies in a horizontal curve of radius 20 m at 15 m/s. The force exerted by the air on the bird is about

Question 3 options:

a)

1.7 N

b)

3.48 N

c)

zero

d)

2.9 N

e)

4.5 N

Answer 1

b) 3.48 N approx.

Explanation:

The bird will experience a centripetal force, this is the force exerted on a body that moves through a curve path.

`F_c = (mv^2)/(r)`

Fc=centripetal force

m=mass

v=velocity

r=radius

Step one:

given data

mass of bird m=0.3kg

the radius of curve r= 20m

velocity v= 15 m/s

Substituting we have

`F_c = (0.3*15^2)/(20)\\\\F_c= (0.3*225)/(20)\\\\ F_c=(67.5)/(20)\\\\F_c=3.37N`

The force is 3.37N