Answer:
To find the acceleration of the motion, we can use the formula: Acceleration = (Final velocity - Initial velocity) / Time. In this case, the initial velocity is 30 m/s and the final velocity is 0 m/s since the bicycle comes to a stop. The time taken is 20 seconds. Plugging in the values into the formula, we get: Acceleration = (0 m/s - 30 m/s) / 20 s Simplifying the calculation: Acceleration = -30 m/s / 20 s The negative sign indicates that the acceleration is in the opposite direction to the initial velocity. Dividing, we find: Acceleration = -1.5 m/s² Therefore, the acceleration of the motion is -1.5 m/s². This means that the bicycle decelerated at a rate of 1.5 meters per second squared until it came to a stop.