Question

A Ferrari with an initial speed of 10 m/s accelerates for 3 s until it reaches a speed of 6 m/s. What is its acceleration?

a) -4/3 m/s²
b) 4/3 m/s²
c) -2/3 m/s²
d) 2/3 m/s²

Answer 1

The acceleration of the Ferrari is calculated using the formula (v - u) / t, yielding an acceleration of -4/3 m/s², which indicates the car is decelerating.

Step-by-step explanation:

The question involves calculating the acceleration of a Ferrari that decreases its speed from 10 m/s to 6 m/s over a period of 3 seconds. To find the acceleration, we use the formula:

a = (v - u) / t

Where:

• a is the acceleration,
• v is the final velocity (6 m/s),
• u is the initial velocity (10 m/s), and
• t is the time (3 s).

By substituting the given values into the formula, we get:

a = (6 m/s - 10 m/s) / 3 s

a = (-4 m/s) / 3 s

a = -4/3 m/s²

The negative sign indicates that the car is decelerating. Therefore, the correct answer is: a) -4/3 m/s².