What is the average acceleration of a car that starts from
and moves straight ahead at 18 m/s in 12 s?

1.5m/s^2

Explanation:

In the picture above.

The car is moving at an average acceleration of 1.5 m/s2

Explanation:

According to the question,

The car is moving in a straight road

The speed of the car = 18 m/s

Time is given (t) = 12 s

Acceleration is the rate of change of speed with respect to time. It is computed by the formula;

Acceleration = (18 m/s)/(12 s)= 1.5 m/s2

Therefore, the car is moving at an average acceleration of 1.5 m/s2

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

resonant frequency