Q1)
(a)
Is it possible for an object to be accelerating
when the velocity of the object is constant?
(b)
When
the speed of an object is constant?
1)
(a)
yes
(b)
yes
2)
(a)
yes
(b)
no
3)
(a)
no
(b)
no
4)
(a)
no
(b)
yes
Q2)
A car rounds a curve while maintaining a constant
speed. Is there a net force on the car as it rounds the curve?
1)
No  its speed is constant.
2)
Yes.
3)
Depends
Q3)
An object moving in a circle at constant speed:
1)
must have only one force acting on it
2)
is not accelerating
3)
is held to its path by centrifugal force
4)
has an acceleration of constant magnitude
5)
has an acceleration that is tangent to the circle
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View Full DocumentQ4)
A particle moves at constant speed in a circular path. The
instantaneous velocity and instantaneous acceleration vectors are:
1)
both tangent to the circular path
2)
both perpendicular to the circular path
3)
perpendicular to each other
4)
opposite to each other
5)
none of the above
Q5)
A ball is whirled on the end of a string in a horizontal circle of
radius
R
at constant speed
v
. The centripetal acceleration of the ball
can be increased by a factor of 4 by
1)
keeping the speed fixed and increasing the radius by a factor of 4.
2)
keeping the radius fixed and increasing the speed by a factor of 4.
3)
keeping the radius fixed and increasing the period by a factor of 4.
4)
keeping the radius fixed and decreasing the period by a factor of 4.
5)
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 Fall '09
 BOWEN
 Circular Motion, Force, Velocity, constant speed

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