Question

What is the acceleration of an object moving with the velocity of 20 m/s in a straight line?

Answer 1

Answer:

Acceleration is change in velocity per unit time. Velocity is the rate of displacement (distance travelled) per unit time, which has a direction and magnitude; the magnitude is often called speed.

Since it says here that the velocity changes from 20 m/s to 50 m/s we can assume it keeps moving in the same direction.

The object’s velocity changes in size by 50 - 20 = 30 m/s.

This change takes 5 seconds or 5 units of time.

Since acceleration, a = change in velocity/unit time = total change in velocity/total number of time units, we now can calculate a = 30/5 = 6 m/s².

Indeed that is 6 metres per second (velocity change) per second (per unit time), or 6 m/s/s = 6 m/s²

I hope I helped you understand how this works.

Answer 2

Explanation:

u=0 ,v=20m/a=? we know that acceleration = v-u/t so,20-o/1= 20 m/s