Circular Motion
Circular motion quiz.
- 1.
A coin and a ring roll down an incline starting at the same time. The one to reach the bottom first will be the
- A.
Ring
- B.
Coin
- C.
The one with the least mass
- D.
Both will reach at the same time
Correct Answer
B. Coin -
- 2.
A torque acting on an objct tend to produce
- A.
Equilibrium
- B.
Linear motion
- C.
A center of gravity
- D.
Rotation
Correct Answer
D. Rotation -
- 3.
On a balanced see-saw, a boy three times as heavy as his partner sits
- A.
More than 1/3 the distance from the fulcrum
- B.
Less than 1/3 the distance from the fulcrum
- C.
1/3 the distance from the fulcrum
Correct Answer
C. 1/3 the distance from the fulcrum -
- 4.
Toss a baseball bat into the air and it wobbles about its
- A.
Center of mass
- B.
Heavier end
- C.
Geometrical center
Correct Answer
A. Center of mass -
- 5.
If you balance a broom horizontally on one finger, the center of gravity of the broom will be above your finger - closer to the bristles end than the handle end. If you saw the broom in two pieces at that point and weigh the two parts on a scale, you'll find that the lighter part is the
- A.
Handle part
- B.
Bristles part
- C.
They have the same weight
Correct Answer
A. Handle part -
- 6.
Since angular momentum is conserved in a rotating object,
- A.
Speed decreases while mass is constant
- B.
Speed decreases as mass decreases
- C.
Speed increases as radial length decreases
- D.
Speed increases as radial length increases
Correct Answer
C. Speed increases as radial length decreases -
- 7.
Suppose you are at the center of a large freely rotating horizontal turntable in a carnival fun house. As you crawl toward the edge, the angular momentum of you and the turntable
- A.
Decreases
- B.
Increases
- C.
Decreases in direct proportion to your decrease in RPMs
- D.
Remains the same, but the RPM decrease
Correct Answer
D. Remains the same, but the RPM decrease -
- 8.
If the polar icecaps melted, the resulting water would spread over the entire earth. The new mass distribution would tend to make the length of the day
- A.
Shorter
- B.
Longer
- C.
Stay the same
Correct Answer
A. Shorter -
- 9.
A 1kg rock is suspended from the tip of a meter stick at the 0cm mark so that the meter stick balances like a see-saw when the fulcrum is at the 25cm mark. From this information what is the mass of the meter stick?
- A.
1/2 kg
- B.
1/4 kg
- C.
1 kg
- D.
3/4 kg
- E.
More than 1 kg
Correct Answer
C. 1 kg -
- 10.
Two people are balanced on a see-saw. If one person leans toward the center of the see-saw, that person's end will
- A.
Fall
- B.
Rise
- C.
Stay the same
Correct Answer
B. Rise -
- 11.
A tightrope walker more easily balances on a tightrope if his pole
- A.
Is held high
- B.
Droops (bends)
- C.
Is short and light
- D.
Is short and heavy
Correct Answer
B. Droops (bends) -
- 12.
When doing somersaults, you'll more easily rotate when your body is
- A.
Straight
- B.
Balled up
- C.
No difference
Correct Answer
B. Balled up -
- 13.
The famous leaning tower of pisa doesn't topple over because its center of gravity is
- A.
Displaced from its center
- B.
In the same place as its center of mass
- C.
Above a place of support
- D.
Relatively low for such a tall building
Correct Answer
C. Above a place of support -
- 14.
As centrifugal force increases
- A.
Centripetal force decreases
- B.
Centripetal force increases
- C.
Centripetal force must be constant
- D.
Center of mass increases
Correct Answer
B. Centripetal force increases -
- 15.
To turn a stubborn screw, it is best to use a screwdriver that has a
- A.
Wide handle
- B.
Long handle
- C.
Yellow color
- D.
None of these
Correct Answer
A. Wide handle -
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Current Version
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Oct 23, 2018Quiz Edited by
ProProfs Editorial Team -
Dec 10, 2009Quiz Created by
11reefeg
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