Question

when a cars velocity is negative and its acceleration is negative, what is happening to the cars motion? the car remains at rest. the car travels at constant speed. the car slows down. the car speeds up. question 5 motion of ball moving on ramp the graph above describes the motion of a ball. at what point is the velocity of the ball equal to its velocity at b? c d none of the above a

Explanation:

1. For the car - velocity and acceleration relationship: When velocity and acceleration have the same sign, the speed of the object changes in the direction of the velocity. Since both the car's velocity and acceleration are negative, the car is speeding up in the negative - direction.
2. For the ball's motion graph: The slope of a position - time graph represents velocity. Points with the same slope have the same velocity. Point B and Point D have the same slope on the position - time graph, so they have the same velocity.

Answer:

1. The car speeds up.
2. D