Answered

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A rock from a volcanic eruption is launched straight up into the air with no appreciable air
resistance. Which one of the following statements about this rock while it is in the air is
correct?
a. The acceleration is downward at all points in the motion.
b. Throughout the motion, the acceleration is downward, and the velocity is always in
the same direction as the acceleration.
c. On the way down, both its velocity and acceleration are downward, and at the
highest point both its velocity and acceleration are zero.
d. The acceleration is downward at all points in the motion except that is zero at the
highest point.

Sagot :

RevyBreeze

Answer:

A. The acceleration is downward at all points in the motion.

Explanation:

Did this before on Quiz 2.4 Free Fall

The statement which is true about the rock which is launched from a volcanic eruption is acceleration is downward at all points in the motion.

What is projectile motion?

Projectile motion is the motion of the body, when it is thrown in the air taking the action of gravity on it.

A rock from a volcanic eruption is launched straight up into the air with no appreciable air resistance. Let's check point wise what happens with this rock.

  • The rock is launched with upward velocity and reached to its highest point.
  • At the highest point the rock stopped and started to free fall due to the acceleration of gravity.
  • This acceleration also working on the rock while it was going up in the air, due to which the rock slows down.

Hence, with the above point it can be concluded that the acceleration on the rock is always working on the rock in downward direction, which slows it down, and bring back it on the earth.

Thus, the statement which is true about the rock which is launched from a volcanic eruption is acceleration is downward at all points in the motion.

Learn more about the projectile motion here;

https://brainly.com/question/24216590

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