Aspring-powered dart gun is mounted vertically. a dart is inserted into the barrel of the gun and pushed down, compressing the (ideal) spring until the trigger is engaged. the trigger is then pulled, releasing the spring, which pushes the dart. the dart leaves the gun vertically and remains vertical (it does not rotate along any axis) until it reaches its highest point. the information given is as follows: what is the maximum height that the dart will achieve (above its original position on the compressed spring)?

iron would move it is magnetic there is a mag field around the current in the wire

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.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.