Question

A train is traveling north at a velocity of 50 m/s. After 10 seconds, it slows to a velocity of 30 m/s. Calculate the train’s deceleration.

A) 2 m/s²
B) 20 m/s²
C) -2 m/s²
D) -20 m/s²

Answer 1

The train's deceleration is -20 m/s².

Step-by-step explanation:

The deceleration of the train can be calculated using the formula:

Acceleration = (Final Velocity - Initial Velocity) / Time

Given that the initial velocity of the train is 50 m/s, the final velocity is 30 m/s, and the time taken is 10 seconds, we can substitute these values into the formula:

Acceleration = (30 m/s - 50 m/s) / 10 s

Acceleration = -20 m/s²

Therefore, the deceleration of the train is -20 m/s² (option D).