Question

Alex rode her skateboard to the library. Her velocity changed from 3 m/s west

to 1 m/s west in 4 seconds. What was her acceleration?
O A. -2 m/s2 west
O B. -4m/s2 west
OC. 0.5 m/s² west
OD. -3 m/s² west

Answer 1

a = 0.5 m/s²

Step-by-step explanation:

Given that,

Initial velocity, u = -3 m/s (west)

Final velocity, v = -1 m/s (west)

Time, t = 4 s

We need to find the acceleration of Alex. Acceleration of an object is the rate of change of velocity per unit time. So,

`a=(v-u)/(t)\\\\a=(\left(-1\right)-\left(-3\right))/(4)\\\\a=0.5\ m/s^2`

So, her acceleration is 0.5 m/s². Hence, the correct option is (c).