Clicker Questions for NEXUS/Physics

Oscillations

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A mass connected to a spring is oscillating back and forth. Consider two possibilities.Which are true?

(i) at some point during the oscillation the mass has v = 0 but a ≠0 (ii) at some point during the oscillation

the mass has v = 0 and a = 0 .

A. Both occur sometime during the oscillation.B. Neither occurs during the oscillation.C. Only (i) occurs.D. Only (ii) occurs.

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Tracking the motion

x

x

x

x

0

0 0

0

0 0

0

0

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If curve (A) is

which curve is

A. (A)B. (B)C. (C)D. None of the above.

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Which of these curves is described by

with φ > 0 (and φ << 2π)?

A. (A)B. (B)C. (C)D. None of the above.

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When we pull the mass down from its equilibrium and release it, what happens to the energies?

The gravitational PE

A. increases

B. decreases

C. remains the same

D. you can’t tell from the information given.

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When we pull the mass down from its equilibrium and release it, what happens to the energies?

The spring PE

A. increases

B. decreases

C. remains the same

D. you can’t tell from the information given.

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When we push the mass upfrom its equilibrium and release it, what happens to the energies?

The gravitational PE

A. increases

B. decreases

C. remains the same

D. you can’t tell from the information given.

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When we push the mass upfrom its equilibrium and release it, what happens to the energies?

The springPE

A. increases

B. decreases

C. remains the same

D. you can’t tell from the information given.

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A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.

Which graph could represent thevelocity of the mass?

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A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.

Which graph could represent thenet forceon the mass?

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A mass is hanging from a spring. The position of the mass is measured by a sonic ranger sitting 25 cm under the mass’s equilibrium position. At some time, the mass is started oscillating. At a later time, the sonic ranger begins to take data.

Which graph could represent thepotential energyof the spring?

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A pendulum is swinging back and forth between the extremes marked A and C. At point B it is directly below the pivot.

When it reaches B, the string breaks. What path will the ball follow after the break?

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A pendulum is swinging back and forth between the extremes marked A and C. At point B it is directly below the pivot.

When it reaches C, the string breaks. What path will the ball follow after the break?

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A pendulum swings in the plane in front of the marked board. There is a peg (indicated). When the ball passes the peg it will pivot from the peg instead of from the original pivot. How high will it go on the right?

A. Not as high as the 30 cm line.

B. Just up to the 30 cm line.

C. Higher than the 30 cm line.

D. You don’t have enough information to tell.

peg