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Rotational Motion 1
Test Description: Chapter 12 Conceptual Physics Rotational Motion
Instructions: Answer all questions to get your test result.
1) The rotational inertia of an object is greater when most of the mass is located
A
off center
B
near the center
C
away from the rotational axis
D
on the rotational axis
2) For round objects rolling on an incline, the faster objects are generally those with the
A
greatest rotational inertia compared with mass
B
lowest rotational inertia compared with mass
C
highest center of gravity
D
most streamlining
3) For an object traveling in a circular path, its angular momentum doubles when its linear speed
A
remains the same and its radius doubles
B
and its radius remain the same and its mass doubles
C
all of these answers
D
doubles and its radius remains the same
4) The angular momentum of a system is conserved
A
when angular velocity remains unchanged
B
at some times
C
never
D
at all times
5) Which of the following is TRUE about rotational inertia?
A
Neither description is true
B
Both descriptions are true
C
Rotational inertia depends on the mass of an object.
D
Rotational inertia depends on the distribution of mass in the object.
6) Rank the following from LOWEST to HIGHEST rotational inertia: a) a baseball bat held at its narrow end b) a baseball bat held at its more massive end c) a meter stick held at its m
A
c, a, b
B
c, b, a
C
a, b, c
D
b, c, a
7) Which of the following is TRUE?
A
Rotational velocity is a vector quantity.
B
Rotational velocity lies along the axis of rotation of an object.
C
All of these statements are true
D
Rotational velocity has the same direction as angular momentum.
8) Which of the following statements is TRUE?
A
The rotational inertia of an object is constant and cannot change.
B
According to the law of inertia, rotating objects tend to keep rotating.
C
All of these statements are true
D
Newton’s first law does not apply to rotating object.
9) Which of the following statements is TRUE?
A
An object with a great rotational inertia will roll down an incline more quickly that one with a sma
B
Inertia can be thought of as a measure of “laziness”.
C
All of these statements are true.
D
Any hollow cylinder will roll down an incline with more acceleration than any solid cylinder.
10) Which of the following is FALSE?
A
The angular momentum of a small object rotating at a very large radial distance is equal to its line
B
When rotational speed is assigned a direction, it is known as rotational velocity.
C
All of these statements are true
D
Any moving object has momentum.
*select an answer for all questions
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