Question

Toby glances at the speedometer on his bicycle as he begins to roll downhill. It indicates he is traveling at 12 miles per hour when he initially looks at it and 20 miles per hour 4 seconds later. His acceleration is?

Answer 1

The acceleration of Toby's bicycle as he rolls downhill is calculated to be approximately 0.895 meters per second squared using the change in velocity and the time interval provided.

Step-by-step explanation:

The acceleration of Toby's bicycle as it rolls downhill can be calculated using the change in velocity and the time interval. The initial velocity (Vi) is 12 miles per hour, which is equivalent to approximately 5.36 meters per second (m/s), and the final velocity (Vf) is 20 miles per hour, which is approximately 8.94 m/s. The time interval (t) is 4 seconds. The acceleration (a) can be determined using the formula a = (Vf - Vi) / t. Plugging in the values:

a = (8.94 m/s - 5.36 m/s) / 4 s = 3.58 m/s² / 4 s = 0.895 m/s²

So, Toby's bicycle accelerates at 0.895 meters per second squared as he rolls downhill.