Question

A car is sitting a red light when the light turns green. The car goes. After 10 seconds the car is traveling at a speed of 20 m/s. What is the car's acceleration?

Answer 1

The car's acceleration at the green light is 2 meters per second squared (2 m/s²), calculated using the formula for uniform acceleration.

Step-by-step explanation:

The car's acceleration can be found using the formula for uniform acceleration, which is a = (v - u) / t, where 'a' is acceleration, 'v' is the final velocity, 'u' is the initial velocity, and 't' is the time taken. Given that the initial velocity (u) is 0 m/s (since the car is at rest), the final velocity (v) is 20 m/s, and the time (t) is 10 seconds, we can substitute these values into the formula to find the car's acceleration.

So, a = (20 m/s - 0 m/s) / 10 s = 20 m/s / 10 s = 2 m/s².

Therefore, the car's acceleration is 2 meters per second squared (2 m/s²).