A car rounds a circle while maintaining a constant speed. At the

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A car rounds a circle while
maintaining a constant
speed. At the instant shown
in the diagram, does the car
have an acceleration as it
rounds the curve?
A. No, because its speed is
constant.
B. Yes.
C. Not enough
information is given.
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A car rounds a circle while maintaining a constant speed.
Which arrow represents the direction of the net force on
the car as it rounds the curve at the instant shown above?
1.
2.
3.
4.
5.
6.
7.
8.
9.
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ab
o
ve
0%
th
e
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of
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on
e
A.
B.
C.
D.
E. None of
the above
N
Bob the block is placed
next to the cylindrical
glass wall of an
amusement park ride.
The cylinder then spins up
to a constant angular
velocity, and spinning Bob
remains stuck to the wall
even when the floor
drops away. The freebody diagram of all forces
acting on Bob looks like:
In a physics lab, you place a block
on the top of a low-friction ramp.
The block slides down the ramp,
around a circular part at the
bottom, up a ramp on the other
side, and then shoots off the end.
At what point (if any) is the net
force on the block zero?
0%
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th
e
ab
o
ve
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of
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on
e
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N
A.
B.
C.
D.
E. None of the above
A.
B.
Which of the diagrams shows
possible directions of tangential
velocity (v) and acceleration (a)
vectors for an object moving at a
constant speed in a circular
trajectory?
C.
D.
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An object of mass 10 kg is moving at a constant
speed in a circle of radius 12 m. The period of
revolution (the time it takes to complete one
revolution) is 45 s. Find the tangential speed of
the object (in m/s).
Rank
1
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4
5
6
Responses
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An object of mass 10 kg is moving at a constant
speed in a circle of radius 12 m. The period of
revolution is 45 s. Find the acceleration of the
object (in m/s2).
Rank
1
2
3
4
5
6
Responses
0%
1
0%
2
0%
3
0%
4
0%
5
0%
6
An object of mass 10 kg is moving at a constant
speed in a circle of radius 12 m. The period of
revolution is 45 s. Find the net force acting on
the object.
Rank
1
2
3
4
5
6
Responses
0%
1
0%
2
0%
3
0%
4
0%
5
0%
6

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