109k views
2 votes
A car rolls forward 5 ft. The car wheel has a 16 in radius. Through what angle (to the nearest tenth of a degree) does the wheel turn?

User Pinchus
by
7.0k points

1 Answer

1 vote

Answer:

214.9°

Explanation:

You want to know the angle of rotation that moves a point on a circle of 16 inch radius a distance of 5 feet.

Arc length

The relation between the length of an arc and the central angle in radians is ...

s = rθ

The distance of 5 ft is equal to 60 inches, so we have ...

60 = 16θ

Angle

Solving for θ gives ...

θ = 60/16 = 15/4 . . . . radians

The angle in radians can be converted to an angle in degrees by multiplying it by 180°/π:

15/4 radians = (15/4)·(180°/π) ≈ 214.9°

The wheel turned through an angle of about 214.9°.

User MastaBlasta
by
7.4k points