No force is necessary to
1. keep an object moving the way it is al-
ready moving.
2. cause a change in the motion of an ob-
ject.
3. stop an object from moving.
4. start an object moving.

1. keep an object moving the way it is already moving.

Explanation:

As we know that net force on the object is product of mass and its acceleration

so it is given as

here we know that

so when an object is applied by some force F then its motion is accelerated so here the velocity of the object will change

So if there is No force on the object then the velocity will remain same and hence there is no change in the motion of the object

so correct answer will be

1. keep an object moving the way it is already moving.

answer:   you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )