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Physics Class 11 - Chapter 5BRCircular MotionBRTest - 3
1.
The span of broad jump depends upon?
a) All of these
b) Mass of the jumper
c) Angle of projection
d) Height of the jumper
2.
In case of planets the necessary acceleration is provided by?
a) Centripetal force
b) Frictional force
c) Gravitational force
d) Coulomb force
3.
When a body is moving along a circle of radius r with linear velocity V providing centripetal force is?
a) mV/r
^{2}
b) mV
^{2}
/r
c) mV
^{2}
/r
^{2}
d) mV/r
4.
Minimum number of commercial satellites required to cover the whole earth is?
a) 3
b) 4
c) 6
d) 5
5.
The direction of linear velocity of body moving in a circular is?
a) Along the axis of rotation
b) Along the direction
c) Direction towards the center
d) Direction away from the center
6.
A body of 2 kg is suspended from ceiling of an elevator moving up with an acceleration then its apparent weight will be?
a) 39.2N
b) 19.6N
c) 125N
d) 9.8N
7.
When a body is moving along a circular path it covers an angle in a given time, such motion is?
a) Linear motion
b) Angular motion
c) Rotation motion
d) Vibratory motion
8.
How many days would be in one year if the distance between the earth and sun is reduced to half of its present value?
a) 129 days
b) 350 days
c) 730 days
d) 365 days
e) 700 days
9.
Centripetal force performs?
a) Minimum work
b) No work
c) Maximum work
d) Negative work
10.
If a body of mass 10 kg is falling freely, its weight becomes?
a) 90 N
b) Infinite
c) Zero
d) 89 N
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