In which of the following cases does a car have a negative velocity and a positive acceleration? A car that is traveling in the:

a. + x direction decreasing in speed.

b. - x direction at a constant 20 m/s.

c. - x direction decreasing in speed.

d. + x direction increasing in speed.

e. - x direction increasing in speed.

option C

Explanation:

The correct answer is option C.

For negative velocity

Negative velocity is when the velocity of the object in a negative direction.

so, for the velocity of the car to be negative, it should be in - x-direction.

For positive acceleration

Positive acceleration is the change of the velocity of the object with respect to time in a positive direction

but when the velocity of the object is in negative direction the slowing down of the vehicle will give positive acceleration.

hence, the correct answer is an option - x-direction decreasing in speed.