Let be the acceleration due to gravity at Earth's surface and the rotational kinetic…

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

Problem

Let

g

be the acceleration due to gravity at Earth's surface and

K

the rotational kinetic energy of Earth. Suppose Earth's radius decreases by

2\%

, keeping all other quantities constant. Then (1)

g

increases by

2\%

and

K

increases by

2\%

. (2)

g

increases by

4\%

and

K

increases by

4\%

. (3)

g

decreases by

4\%

and

K

decreases by

2\%

. (4)

g

decreases by

2\%

and

K

decreases by

4\%