(5) At what times is the ACCELERATION zer0 A.) Only at t = 0:0; 8:0 seconds. B.)

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Question

(5) At what times is the ACCELERATION zer0

A.) Only at t = 0:0; 8:0 seconds.

B.) Only at t = 2:0 seconds.

C.) Only at t = 6:0 seconds.

D.) Only at t = 2:0; 6:0 seconds.

E.) Only at t = 0:0; 2:0; 8:0 seconds.

AB.) The acceleration is never zero; the particle is always accelerating.

(6) What best describes the motion at t = 4:0 seconds?

A.) Moving forward, constant speed.

B.) Moving forward, slowing down.

C.) Moving forward, speeding up.

D.) Moving backward, constant speed.

E.) Moving backward, slowing down.

AB.) Moving backward, speeding up.

(7) What is the INSTANTANEOUS acceleration at t = 5:5 seconds?

A.) -7.00 m/s2

B.) -3.75 m/s2

C.) -0.68 m/s2

D.) 0.00 m/s2

E.) +0.68 m/s2

AB.) +3.75 m/s2

AC.) +7.00 m/s2

(8) The displacement of the particle between t = 2:0 and t = 8:0 seconds is most nearly

A.) 160 meters backward

B.) 128 meters backward

C.) 64 meters backward

D.) 24 meters backward

E.) zero displacement

AB.) 24 meters forward

AC.) 64 meters forward

AD.) 128 meters forward

AE.) 160 meters forward

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