What needs to be known about an object in order to determine its kinetic energy. P. S Please help I need to answer this question for my pendulum experiment.

we need to know it's

mass and velocity

Explanation:

then use the formula of kinetic energy

Mass and velocity (or motion).

Explanation:

KE=(1/2)mv^2.

The kinetic energy of an object is the amount of work (expended energy) that's required to move (or more accurately, to accelerate) the object to a specific velocity.  So, if you know the mass of the object, and you know it's current velocity, you can determine it's kinetic energy with the formula above.

1.solid

2.carbon dioxide

3.helium