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 Reset Next

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10-09-2019
Chemistry

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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 Reset Next

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joshnajd joshnajd · Answer 1 · 2019-09-18T09:21:50+02:00

Answer: Acceleration of the ball in the given system is 5 meter per Second Square

The laws of motion are used to determine various aspects of an object in motion.

Explanation:

Applying the first law of motion to calculate acceleration; if formula used in first law is given as [tex]v=u+at[/tex]

Here we have a final velocity as 40 meter per second and initial velocity as 20 meter per second and time span is given as 2 second applying the given values in the given equation and finding the value of a

[tex]30=20+a \times 2 = a=5 m/s^2[/tex]

maddieshae5433 maddieshae5433 · Answer 2 · 2022-01-20T15:58:36+01:00

maddieshae5433 maddieshae5433

20-01-2022

Answer:

Centripetal acceleration is 47 m/s²

Explanation:

It is given that,

Radius of the circle, r = 1.8 meters

The velocity of the ball, v = 9.2 m/s

We have to find the centripetal force of a ball on a string that is whirled horizontally over a boy’s head. It is given by :

So, the centripetal acceleration of the ball on a string is 47 m/s². Hence, the correct option is (E).

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