A traffic light turns green, a car accelerate from rest and cover 10m in 4s . What is the acceleration of the car , assume uniform acceleration

To find the acceleration of the car, we can use the formula:

acceleration = (final velocity - initial velocity) / time

In this case, the car starts from rest, which means its initial velocity is 0 m/s. The car covers a distance of 10m in 4 seconds.

We can find the final velocity by using the formula:

final velocity = initial velocity + (acceleration * time)

Since the car starts from rest, the initial velocity is 0 m/s. We can substitute these values into the formula:

10 = (0 + acceleration * 4)

Simplifying the equation:

10 = 4 * acceleration

Dividing both sides by 4:

acceleration = 10 / 4 = 2.5 m/s^2

So, the acceleration of the car is 2.5 m/s^2.

To find the acceleration of the car, we can use the following equation:

acceleration = (final velocity - initial velocity) / time

In this case, the car starts from rest, so the initial velocity (u) is 0 m/s. The car covers a distance of 10 meters in a time of 4 seconds.

First, let's calculate the final velocity (v):

distance = (initial velocity + final velocity) / 2 * time

10 = (0 + v) / 2 * 4

Now, let's solve for v:

10 = v / 8

v = 10 * 8

v = 80 m/s

Now, we can calculate the acceleration:

acceleration = (final velocity - initial velocity) / time

acceleration = (80 - 0) / 4

acceleration = 20 m/s^2

Therefore, the acceleration of the car is 20 m/s^2.