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MCQ Questions for CBSE Class 12 with Answers
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Rotational Inertia Class 9 MCQ Questions With Answers
1.
Which object listed below has the greatest momentum?
A 0.05 kg object rolling at 0.2 m/s.
A 0.15 kg object rolling at 2 m/s.
A 0.15 kg object rolling at 1 m/s
A 0.4 kg object rolling at 2 m/s.
2.
In translational motion, an objects inertia is determined by its ___________________ .
size
price
mass
position
3.
At which point does the ball has the least gravitational potential energy (GPE)?
A
G
D
C
4.
Work is ____________________ .
hard to find
boring
a change in the universe made by energy
never fun
5.
Why is a choked-up batter easier to swing fast than one at the knob?
The bat distance from the center ( axis) of rotation is longer which decreases rotational inertia
The bat distance from the center (axis) of rotation is longer which increases RPMs
the bat distance from the center ( axis) of rotation is shorter which decreases rotational inertia
the bat distance from the center (axis) of rotation is longer which increases Torque
6.
A push or a pull is called a
Gravity
Force
7.
A ball on a string is spun around in a circle. Which of the following quantities is not constant?
mass
force
velocity
acceleration
8.
A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,
her moment of inertia increases and her angular speed decreases.
her moment of inertia decreases and her angular speed increases.
her moment of inertia increases and her angular speed increases.
her moment of inertia increases and her angular speed remains the same.
9.
If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (T = period = time for ONE revolution, not 5)
9.4 m/s
6.8 m/s
11.7 m/s
3.5 m/s
10.
When this girl lets go of her string, what happens to the ball?
it flies straight due to law of inertia
it flies straight due to law of centripetal force
it curves due to rotational inertia
it curves due to its tangential speed
11.
What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?
5 m/s2
17.63 m/s2
10 m/s2
8.81 m/s2
12.
Which forms of energy are present for objects rolling down an incline?
Gravitational potential energy
Rotational kinetic energy
Kinetic energy
All of above
13.
The time required for one complete revolution is:
torque
frequency
period
rotational kinetic energy
14.
Which has the bigger effect on Moment Of Inertia
Shape
Speed
Radius
Mass
15.
Which of the following is the unit for centripetal force?
J
m/s2
kg⋅m/s
N
16.
The number of complete revolutions per second is:
frequency
period
torque
rotational inertia
17.
Which equation defines rotational kinetic energy?
K=1/2mw2
k=1/2Iw2
k=1/2Iv2
k=1/2mv2
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