Question

**WILL MEDAL**
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

Answer 1

Acceleration is rate of change of velocity or (v-u)/t = (10-0)/4= 2.5m /s^2

Answer 2

So A?

Answer 3

Yes.

Answer 4

Oh ok thank you thank you thank you!!!

Answer 5

My pleasure.