Question

1. which system on the robot can sometimes move just because of its own weight? a. motor b. drivetrain c. arm d. claw e. structural frame

Explanation:

The arm of a robot can move due to its own weight in some cases. Motors (A) require electrical input to operate. Drivetrains (B) are for locomotion and need power. Claws (D) usually need actuation. Structural frames (E) are for support and not for movement by weight.

Answer:

C. arm