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What is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 s? Take the direction west to be positive, and east to be negative. A. 2.5 m/s2 B. -2.5 m/s2 C. 0.4 m/s2 D. -0.4 m/s2
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What is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 s? Take the direction west to be positive, and east to be negative.

A.
2.5 m/s2

B.
-2.5 m/s2

C.
0.4 m/s2

D.
-0.4 m/s2 PLZZZ HELP ASAP!

User Halfbit
by
8.8k points

1 Answer

6 votes

|acceleration| = (change in speed) / (time for the change)

= (10 m/s - 0) / (4 s)

= (10 / 4) (m/s²)

= 2.5 m/s² .

The direction of the acceleration is west.
User Mvdluit
by
8.4k points
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