Question

multiple select question
select all that apply
select all the cases for which the toy car will increase its instantaneous speed.

the velocity of the car is positive and the acceleration of the car is negative.
the velocity of the car is negative and the acceleration of the car is positive.
the velocity of the car is negative and the acceleration of the car is negative.
the velocity of the car is positive and the acceleration of the car is positive.

Explanation:

Instantaneous speed increases when velocity and acceleration have the same sign:

1. Positive velocity + positive acceleration: the car speeds up in the positive direction.
2. Negative velocity + negative acceleration: the car speeds up in the negative direction.

When velocity and acceleration have opposite signs, the car slows down (speed decreases).

Answer:

• The velocity of the car is negative and the acceleration of the car is negative.
• The velocity of the car is positive and the acceleration of the car is positive.