
Rotational Motion of A Rigid Body (6.3-6.4)

Quiz
•
Physics
•
12th Grade
•
Medium
FATIN BM
Used 6+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suppose a man is sitting on a rotating chair and his arms are outstretched. If he suddenly shortens his arms, what will happen?
ω will decrease
ω will remain constant
I will decrease
L will increase
Answer explanation
When the arm is shorten, the I decreases. So the chair will rotates faster (ω larger).
Smaller I means smaller resistance and easy to rotate.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT TRUE about moment of inertia ?
ΣI = mr2
is the object's resistance to change rotational motion.
I depends on the angular velocity
In principle of conservation of angular momentum, if I is larger, the angular speed is smaller.
Answer explanation
Moment of inertia, I = mr2.
Thus, I depends on
1) mass
2) distribution of mass
3) position of the axis of rotation.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Moment of inertia of a body comes into play ...........
in motion along a curved path
in linear motion
in rotational motion
none of the answers
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Choose the WRONG equation.
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Moment of inertia does NOT depend upon :
angular velocity of the body
shape and size
mass
position of the axis of rotation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During a summersault (balik kuang), a swimmer bends his body to
increase the moment of Inertia
decrease the moment of Inertia
decrease the angular momentum
reduce the angular velocity
Answer explanation
Decreasing the I, means increasing the ω (spins faster).
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Angular momentum is represented by
L
M
I
P
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