Simple true and false questions

[physicskid72]

Homework Statement

true or false


If there is no work there is no kinetic energy.

There has to be a change in velocity for there to be a change in kinetic energy.

when workiong with gravity, the difference in heights is important, the position above the Earth is not.

the sum of the kinetic energy and total energy is the total work.

Homework Equations

The Attempt at a Solution

1.) false
2.)true
3.)false

not sure on these please help

 

[rock.freak667]

You have 4 statements and 3 answers. For the gravity one, why do you think the position above the Earth is relevant?

 

[AdamP]

kinetic energy formula has another variable than the velocity and the problem does not set it as constant so...