Question

a car with a mass of 2150 kg is traveling west at 70 m/s, two minutes later the car is traveling west at 100 m/s. What is the car's acceleration?

Answer 1

The car's acceleration is calculated using the change in velocity over the time interval, resulting in an acceleration of 0.25 m/s² towards the west.

Step-by-step explanation

To calculate the car's acceleration, we use the formula a = (v_f - v_i) / t, where a is acceleration, v_f is the final velocity, v_i is the initial velocity, and t is the time taken to change velocity. In this case, the initial velocity v_i is 70 m/s, the final velocity v_f is 100 m/s, and the time taken t is 2 minutes (which is 120 seconds).

Plugging in the values, we get: a = (100 m/s - 70 m/s) / 120 s = 30 m/s / 120 s = 0.25 m/s². The car's acceleration is 0.25 m/s², westward.