- 3

- 0

**1. Homework Statement**

A flying saucer decelerates uniformly from 20 m/s [E] to 50 m/s [W] in 9 seconds. Find the velocity for the 9.0 interval.

**2. Homework Equations**

Velocity = acceleration x time

or Velocity = displacement/time

**3. The Attempt at a Solution**

Velocity1 = 20 m/s [E]

Velocity2 = 50 m/s [W]

Time = 9 s

Velocity = 30 x 9

= 270

However, the answer should be 15 m/s [W].