Rotational Motion 1 Question Preview (ID: 11865)


Chapter 12 Conceptual Physics Rotational Motion. TEACHERS: click here for quick copy question ID numbers.

The rotational inertia of an object is greater when most of the mass is located
a) near the center
b) off center
c) on the rotational axis
d) away from the rotational axis

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) most streamlining
d) highest center of gravity

For an object traveling in a circular path, its angular momentum doubles when its linear speed
a) doubles and its radius remains the same
b) remains the same and its radius doubles
c) and its radius remain the same and its mass doubles
d) all of these answers

The angular momentum of a system is conserved
a) never
b) at some times
c) at all times
d) when angular velocity remains unchanged

Which of the following is TRUE about rotational inertia?
a) Rotational inertia depends on the mass of an object.
b) Rotational inertia depends on the distribution of mass in the object.
c) Both descriptions are true
d) Neither description is true

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, b, a
b) c, a, b
c) b, c, a
d) a, b, c

Which of the following is TRUE?
a) Rotational velocity is a vector quantity.
b) Rotational velocity has the same direction as angular momentum.
c) Rotational velocity lies along the axis of rotation of an object.
d) All of these statements are true

Which of the following statements is TRUE?
a) Newton’s first law does not apply to rotating object.
b) According to the law of inertia, rotating objects tend to keep rotating.
c) The rotational inertia of an object is constant and cannot change.
d) All of these statements are true

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) Any hollow cylinder will roll down an incline with more acceleration than any solid cylinder.
d) All of these statements are true.

Which of the following is FALSE?
a) Any moving object has momentum.
b) When rotational speed is assigned a direction, it is known as rotational velocity.
c) The angular momentum of a small object rotating at a very large radial distance is equal to its line
d) All of these statements are true

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