Question

A 30 kg object takes one MINUTE to travel east 240 m. It began travelling at 240 m/s and came to a stop (0 m/s) at the end. What was its acceleration?

A: -4
B: -0.125
C: 8
D: 1

Answer 1

To find the acceleration of the object, we need to use the equation:

acceleration = (final velocity - initial velocity) / time

In this case, the initial velocity of the object was 240 m/s, the final velocity was 0 m/s, and the time was 1 minute. Plugging these values into the equation, we get:

acceleration = (0 m/s - 240 m/s) / (1 minute) = -240 m/s / 1 minute = -240 m/s^2 / 60 s = -4 m/s^2

Thus, the acceleration of the object is -4 m/s^2, which corresponds to answer choice A.