Question

A car is moving at constant speed on the

freeway. The driver sees a patrol car at time
ti and rapidly slows down by around 10 miles
per hour. After continuing at this speed for
a few minutes, the driver at time ty quickly
accelerates to the original constant speed.
Which graph correctly describes the car's
acceleration a(t) as a function of time? Take
the forward direction of motion as positive.

Answer 1

The graph that correctly describes the car's acceleration as a function of time is (c).

The graph that correctly describes the car's acceleration as a function of time is (c). In this graph, the acceleration has a constant value for a certain time interval, indicating constant acceleration. The slope of the velocity vs. time graph is constant during this interval.

The moon orbiting the earth, an apple falling, or a car stopping at a traffic light are a few instances of acceleration. These illustrations help us to understand that acceleration happens when a moving object changes direction or experiences a speed increase or reduction.

The acceleration unit in the SI is metres/second2 (m/s2). Newton's Second Law, which states that "The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass," establishes a relationship between force (F), mass (m), and acceleration (g).

Answer 2

Answer: graph 6

Step-by-step explanation:

The car is at first moving at a constant speed and there is no acceleration.

After seeing a patrol car it starts slowing down i.e. decelerating for a short while the car moves at a lower constant speed. At timet2 the car then accelerates to the original constant speed at which it remains.