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Physics 9 Chapter 3 - Dynamics - 24
1.
What is the motion of an object in a circular path called?
a) Rotatory motion
b) Oscillatory motion
c) Vibratory motion
d) Circular motion
2.
What is the centre seeking force called?
a) Contrive force
b) Centrifugal force
c) Centripetal force
d) Cent rip force
3.
What force always acts perpendicular to the motion of the body?
a) Contrive force
b) Centripetal force
c) Cent rip force
d) Centrifugal force
4.
What is a force called that keeps a body to move in a circle?
a) Centripetal force
b) Centrifugal force
c) Cent rip force
d) Contrive force
5.
What is the motion of the moon around the earth called?
a) Rotatory motion
b) Circular motion
c) Vibratory motion
d) Oscillatory motion
6.
What provides the necessary centripetal force for a stone tied to one end of a string rotating in a circle?
a) Tension in the string
b) Circular motion
c) Weight of the string
d) Weight of the stone
7.
What force keeps the stone tied to one end of a string to remain in a circle?
a) Centrifugal force
b) Centripetal force
c) Friction force
d) Contrive force
8.
What force provides the necessary centripetal force for a moon to revolve around the earth?
a) Gravitational force of the Moon
b) Gravitational force of the Earth
c) Friction force of the Moon
d) Friction force of the Earth
9.
What is the formula for centripetal acceleration ac produced by the centripetal force Fc?
a) Formula: a
c
= v
2
/ r
b) Formula: a
c
= v
2
+ r
c) Formula: a
c
= v
2
+ r
d) Formula: a
c
= v / r
10.
By which centripetal force is denoted?
a) Ce
b) Fc
c) Fo
d) Cf
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