Parallelogram of Forces NDA Questions

NDA Physics

Parallelogram of Forces MCQ Questions


7.
The radius of gyration of a body about an axis is the distance from the axis where:
A.
the body's mass is concentrated
B.
the body's mass produces the maximum torque
C.
the body's moment of inertia is maximum
D.
the body's moment of inertia is minimum
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ANSWER :
C. the body's moment of inertia is maximum
8.
The angular velocity of a rotating body is directly proportional to:
A.
its radius
B.
its moment of inertia
C.
its linear velocity
D.
its angular acceleration
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ANSWER :
B. its moment of inertia
9.
Which of the following is a unit of moment of inertia?
A.
kg m/s
B.
kg/m²
C.
kg m²
D.
kg m/s²
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ANSWER :
C. kg m²
10.
The torque acting on a particle is given by the expression:
A.
Force × displacement
B.
Force × perpendicular distance from the axis of rotation
C.
Force × velocity
D.
Force × acceleration
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ANSWER :
B. Force × perpendicular distance from the axis of rotation
11.
A body is rotating about a fixed axis If the angular velocity of the body is doubled, its kinetic energy will become:
A.
Four times
B.
Half
C.
Double
D.
Remains same
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ANSWER :
A. Four times
12.
When a body undergoes uniform circular motion, the direction of acceleration is:
A.
Tangential to the circle
B.
Radial, towards the center of the circle
C.
Parallel to the axis of rotation
D.
Opposite to the direction of velocity
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ANSWER :
B. Radial, towards the center of the circle