A machine uses a wheel of radius to pull a cable

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Torque and Rotational Dynamics · Torque and Rotational Dynamics

Problem

A machine uses a wheel of radius

20\,\text{cm}

to pull a cable. The wheel makes

1800

revolutions to pull the cable a certain length. If the wheel is replaced by another wheel of radius

16\,\text{cm}

, approximately how many revolutions will be needed to pull the same length of cable? (a)

1440

(b)

2820

(c)

2250

(d)

1800