Question

Question 5 of 10

2 Points
A truck is moving 14 m/s to the south. If it takes the truck 20 seconds to
reduce its velocity to 10 m/s south, what is its acceleration?
O
A. 0.2 m/s2 north
O
O
O
B. 0.2 m/s2 south
C. 5 m/s2 north
D. 5 m/s2 south
​

Answer 1

`a = 0.2 m/s^2` towards North

Step-by-step explanation:

Acceleration is defined as rate of change in velocity

So we will have

`a = (v_f - v_i)/(\Delta t)`

now we will have

`v_f = 10 m/s`

`v_i = 14 m/s`

time taken by it

`\Delta t = 20 s`

now we will have

`a = (10 - 14)/(20)`

`a = -0.2 m/s^2`