Calculate the work needed to raise a 30 N cat up to a height of 4 m.

Work = Force X Distance

When my velocity triples, my kinetic energy increases by ______ times.

Kinetic energy = (1/2 mass)(velocity²)

True or false: When the distance an object moves(in the direction of applied force) = zero, the work done on the object is also zero.

The ability of a system to do work or cause change.

Energy due to the position of something

A simple machine that can be made out of a bar that pivots on a fixed point

The ratio of input force to output force.

The magnification of force that is produced when we use machines is called...

Conservation of Energy Question:

Example: A battery releases 100 J of energy to a lamp. The lamp releases 80 J of energy as light but it also releases heat energy. How much heat energy is released? Answer=20 J ( If he total energy input is 100 and 80 is the output as light, that means that 20 J is left as heat 100 J-80 J=20 J ).

Question. A battery releases 200 J of energy to a lamp. the energy is converted to heat and light. 50 J is given out as heat. How much is released as Light?

In a filament bulb the electical power input is 40W and the light (Useful energy) output is 4W. What is the % efficiency? $$\frac{energy\ input}{energy\ output}$$  

Which point has the most kinetic energy?

For work to be done on an object,

A light plastic cart and a heavy steel cart are both pushed with the same force for a distance of 1.0 m, starting from rest. After the force is removed, the kinetic energy of the light plastic cart is ________ that of the heavy steel cart.