A600 kg car is at rest, and then accelerates to 5 m/s. what is its original kinetic energy? j what is its final kinetic energy? j how much work was used? j

1) Original kinetic energy: 0

The kinetic energy of an object is given by:

where m is the mass of the object and v the speed of the object.

In this problem, the mass of the car is m=600 kg, but its initial speed is zero (it is at rest), so v=0 and Ki=0.

2) Final kinetic energy: 7,500 J

Using again the formula for the kinetic energy:

And using the mass of the car (m=600 kg) and its final speed (v=5 m/s), we find

3) Work used: 7,500 J

The kinetic energy theorem states that the work done on an object is equal to its gain in kinetic energy:

Using the kinetic energies found in the previous points, we find the work done

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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.