Maria Throws A Ball Straight Up With An Initial Velocity Of 10 M/S., What Is Its Velocity At The Highest Point?What Is Its Velocity When It Returned T

Maria throws a ball straight up with an initial velocity of 10 m/s.

What is its velocity at the highest point?What is its velocity when it returned to the elevation from where it was thrown?What is its acceleration at the highest point?
What is its acceleration just before it hits the ground?
After 1 second, what is the acceleration of the ball?
a. 0 m/s
b. 0 m/s^2
c. 9.8 m/s^2
d. -9.8 m/s^2
e. 10 m/s^2
f. -10 m/s
g. cannot be determined

 

Good Day

1. Maria throws a ball straight up with an initial velocity of 10 m/s.

What is its velocity at the highest point?

Answer:

a. 0 m/s   (at maximum height, ball comes to a stop before it falls down)

2. What is its velocity when it returned to the elevation from where it was thrown?

The initial velocity going up is the same in the final velocity going down if the elevation are equal.

answer: f. -10 m/s  (negative since the direction is opposite to the initial velocity)

3. What is its acceleration at the highest point?

Answer:

d. - 9.8 m/s^2  (decelerating comes to stop)

4. What is its acceleration just before it hits the ground?

c. 9.8 m/s^2   (accelerating going down)

5. After 1 second, what is the acceleration of the ball?

Acceleration will not change.

9.8 m/s^2 is the acceleration due to gravity (it will become negative going up since it decelerates and positive going down since it accelerates


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