Which of the following is true about kinetic energy?

As an object's speed increases, kinetic energy decreases.
Only moving objects have kinetic energy.
Kinetic energy increases as an object's height increases.
Kinetic energy depends on an object's mass.

Question

Which of the following is true about kinetic energy? 

As an object's speed increases, kinetic energy decreases.
Only moving objects have kinetic energy.
Kinetic energy increases as an object's height increases.
Kinetic energy depends on an object's mass.

anonymous · Answer

Let's take a look at the equation of kinetic energy. $$KE = {1 \over 2} mv^2$$

If we increase the speed, we can see that kinetic energy must do what?

If we have a stationary object, $v=0$. What will the kinetic energy of a stationary object be?

There is no height variable in the kinetic energy equation. Potential energy increases with height. $PE = mgh$

The equation DOES have a mass variable in it.

anonymous · Answer

is it ok if i tell you what i think it is?

anonymous · Answer

i think it is the last one

anonymous · Answer

can anyone tell me if i'm right?

anonymous · Answer

The last one is correct. But one more correct also.