A person sits on a freely spinning lab stool (no friction). When this person extends her arms,
A) her moment of inertia decreases and her angular velocity increases.
B) her moment of inertia decreases and her angular velocity decreases.
C) her moment of inertia increases and her angular velocity increases.
D) her moment of inertia increases and her angular velocity decreases.
E) her moment of inertia increases and her angular velocity remains the same.
Question 2
To determine the mass of a car, a student (with a friend at the wheel) pushes the car holding a bathroom scale between himself and the car and carefully maintains a constant reading of 400 N on the scale while the car accelerates on level ground.
At the conclusion of the experiment his friend reports that the car accelerated from rest to 14.0 km/hr in 12.0 s. What was the mass of the car? A) 343 kg
B) 1230 kg
C) 2460 kg
D) 3360 kg
E) 3430 kg
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
The tools necessary to adjust the valves on an engine with adjustable rocker arms include basic hand ...
Friction significantly influences airflow near Earth’s surface, but its effect is negligible at ...
Warming friction created with a sawing motion (i.e., ulnar friction). The ulnar sides of the hands ...
Circular friction to gluteal muscle attachments using the fist. Use the knuckles or the middle ...
Spring for the Crane and Deer. Beginning position: Legs straight and together, arms at sides of ...