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Chapter 5 - Circular Motion - 2
1.
The magnitude of the centripetal force on a mass m moving with angular speed ωin a circle of radius r is:-
a) mr
2
ω
b) mrω
2
c) mω
2
d) mr
2
ω
2
/ r
2.
The linear velocity of a disc moving down an inclined plane is:-
a) 4 / 3 gh
b) 2 / 3 gh
c) gh
d) 1 / 2 gh
3.
The angular analogue of linear displacement is called ........................?
a) Linear displacement
b) Serial displacement
c) Angular displacement
4.
The acceleration of a body is ............. when it revolves in a circle with constant speed.
a) Directed inwards
b) Not Directed
c) Directed outwards
5.
The work done by a centripetal force is ........................ during half rotation.
a) One
b) Zero
c) Half
d) Two
6.
In circular motion, the linear velocity, the radius and the angular velocity are ........................ to one another.
a) Perpendicular
b) Vertical
c) Horizental
d) Serial
7.
Artificial gravity produced in an orbiting spaceship is to overcome the ........................?
a) Weight
b) Weightlessness
c) Mass
8.
Angular momentum of the universe remains ........................?
a) Unidirectional
b) Circular
c) Constant
d) Semicircula
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