A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. It begins the trip traveling 120 meters per second and decelerates to a velocity of 20 meters per second.
What was its acceleration?
Responses
−1.11 m/s2
negative 1.11 meters per second squared,
−0.3 m/s2
negative 0.3 meters per second squared,
+1.11 m/s2
plus 1.11 meters per second squared,
+80 m/s2
To find the acceleration, we can use the equation:
acceleration = (final velocity - initial velocity) / time
In this case, the initial velocity is 120 m/s, the final velocity is 20 m/s, and the time is 1.5 minutes (or 90 seconds). Plug in these values into the equation:
acceleration = (20 m/s - 120 m/s) / 90 s
acceleration = (-100 m/s) / 90 s
acceleration = -1.11 m/s^2
So, the acceleration of the object is -1.11 m/s^2. Therefore, the correct response is:
Negative 1.11 meters per second squared.