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WorksheetsQUIZ 4 (TOPIC 5 & 6)
Total questions: 15
Worksheet time: 11mins
Name
Class
Date
1.
Which of the following is FALSE about uniform circular motion?
a)
The motion of an object in a circle moving at a constant velocity.
b)
As an object moves in a circle, it is constantly changing its direction.
c)
The linear velocity of an object is moving tangent to the circle.
d)
An object moving in a circle is accelerating.
2.
The direction of centripetal acceleration always
a)
in the direction of object’s motion
b)
towards the centre of the circle
c)
towards outside of the circle
d)
tangent to the circle
3.
What force is needed to keep an object moving in a circle?
a)
Centripetal force
b)
Weight
c)
Normal force
d)
Frictional force
4.
The centripetal force will increase by
a)
decreasing the mass.
b)
increasing the velocity.
c)
decreasing the acceleration.
d)
increasing the radius.
5.
When an object experiences uniform circular motion, the speed is
a)
zero.
b)
increasing with time.
c)
decreasing with time.
d)
constant.
6.
Which of the following parameters remain constant for an object under uniform circular motion?
a)
Linear speed.
b)
Period
c)
Linear velocity
d)
Tangential acceleration
7.
Angular velocity changes with time interval is called
a)
angular displacement
b)
average angular velocity
c)
average angular acceleration
d)
average angular speed
8.
Revolution per minute is the unit of
a)
angular momentum
b)
angular acceleration
c)
angular displacement
d)
angular velocity
9.
An ice skater is spinning with arms folded inwards. Later the ice skater stretches his arms outwards. Which of the following is constant?
a)
Angular displacement
b)
Moment of inertia
c)
Angular momentum
d)
Angular velocity
10.
The moment of inertia of a body NOT depends on
a)
the mass of the body.
b)
the angular velocity of the body.
c)
the axis of rotation of the body.
d)
the distribution of the mass of the body.
11.
When a ballet dancer outstretches her arms, the angular velocity
a)
decreases.
b)
increases.
c)
unchanged.
d)
zero.
12.
The following expressions relate parameters in rotational motion with their corresponding parameters in linear motion EXCEPT
a)
s = rθ
b)
v = rω
c)
a = rα
d)
F = ma
13.
Torque is defined as
a)
a force tending to cause rotation.
b)
the cross product of force and displacement.
c)
the product of force and angular displacement.
d)
the product of force and angular velocity.
14.
What should be done to increase the moment of inertia of a body about an axis?
a)
Increase the angular acceleration.
b)
Increase the angular velocity.
c)
Decrease the angular velocity.
d)
Place part of the body further from the axis.
15.
S.I unit for angular momentum is
a)
a.
b)
b.
c)
c.
d)
d.
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