7. A car accelerates uniformly from rest and reaches a speed of 20m/s in 10 seconds. What is its acceleration? (10 points) a) 1m/s^2 b 2m/s^2 3m/s^2 d) 4m/s^2

Question

Answer 1

To find the acceleration of the car, we can use the formula for acceleration, which is given by:

where

is the acceleration,

is the change in velocity, and

is the change in time.Given that the car starts from rest and reaches a speed of

in

seconds, we can calculate the change in velocity as:

where

is the final velocity and

is the initial velocity. Since the car starts from rest, the initial velocity is

. Therefore, the change in velocity is:

Now, we can calculate the acceleration:

Therefore, the correct answer is:b)

Soru