A 15 kg ball is thrown straight upward with a speed of 20 m/s. What is the maximum height the ball reaches?

As energy is conserved, the potential energy at the ball's highest point is equal to the kinetic energy when it is thrown.

A. 14.0 m
B. 19.8 m
C. 20.4 m
D. 40.8 m

The maximum height reached by the ball is 20.4 m.

Explanation:

We have,

Mass of a ball is 15 kg

It is thrown straight upward with a speed of 20 m/s.

It is required to find the maximum height reached by the ball. Let the maximum height is h. As energy is conserved, the potential energy at the ball's highest point is equal to the kinetic energy when it is thrown. So,

So, the maximum height reached by the ball is 20.4 m.

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explanation:

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the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.