What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a velocity of 30 meters/second?
a. 1.6 meters/second2
b. 3.0 meters/second2
c. 3.4 meters/second2
d. 5.0 meters/second2

d. 5 m/s^2

Explanation:

Acceleration is the change in velocity in a given time.

a = (30-20)/2 = 5

The ball is travelling in horizontal direction with an acceleration of

Option D

Explanation:

The rate at which velocity of an object changes is acceleration i.e., if the velocity of an object is changing, the object is accelerating. The unit of measurement of acceleration is Meter per Seconds Square. Acceleration is the derivative of the changing velocity wrt to time,

Given,  

Initial velocity = 20 m/s  

Final velocity = 30 m/s

Initial time = 0 s

Final time = 2 s

From the equation 1,

Hence, the acceleration of ball moving horizontally is

d. learned preferences i believe is your answer

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.