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Clicker Question 1

Which is faster, a man or a horse?A. ManB. Horse

Clicker Question 1

Which is faster, a man or a horse?A. ManB. HorseC. It depends

Clicker Question 1

Which is faster, a man or a horse?A. ManB. HorseC. It depends! X

QuestionA car moves along a straight section of road. The following graphshows the car’s position as a function of time:

x

t

A

BC

D

EAt what point (or points) do the following conditions apply?

I The displacement (distance from the origin) is zeroI The speed is zeroI The speed is increasingI The speed is decreasing

QuestionA car moves along a straight section of road. The following graphshows the car’s position as a function of time:

x

t

A

BC

D

EAt what point (or points) do the following conditions apply?

I The displacement is zero: before A, and at DI The speed is zero: at B, and EI The speed is increasing: at C, right after B, and right before DI The speed is decreasing: at A, right before B, and right after D

Clicker Question 2: What about the origin of x?

Notice that I haven’t said what the origin of thex-axis is. From my drawing, you don’t know wherex = 0. Is this a problem?A. YesB. NoC. Not sure

Clicker Question 2:What about the origin of x?

Notice that I haven’t said what the origin of thex-axis is. From my drawing, you don’t know wherex = 0. Is this a problem?A. YesB. No: not for the calculation of a velocity. XC. Not sure

QuestionA car moves along a straight section of road. The following graphshows the car’s position as a function of time:

x

t

A

BC

D

EAt what point (or points) do the following conditions apply?

I The displacement (distance from the origin) is zeroI The speed is zeroI The speed is increasingI The speed is decreasing

QuestionA car moves along a straight section of road. The following graphshows the car’s position as a function of time:

x

t

A

BC

D

EAt what point (or points) do the following conditions apply?

I The displacement is zero: before A, and at DI The speed is zero: at B, and EI The speed is increasing: at C, right after B, and right before DI The speed is decreasing: at A, right before B, and right after D