Ch. 4 Sec. 3

Question 1

Law of Conservation of Energy

Answer 1

States that energy cannot be created or destroyed

Energy that can’t be broken down or created

Ex. Energy can only be converted from one to another or transferred from one place to another

Question 2

Mechanical Energy

Answer 2

Sum of the potential energy and kinetic energy of the objects in a system

Potential energy and kinetic energy added up to equal the objects in a system

Ex. Gravitational potential energy, elastic potential energy, and kinetic energy of objects

Question 3

Power

Answer 3

Rate at which energy is converted; measured in watts

Watts is what it si measured in and it is the rate of energy converted

        F Ex. P= -
       T

Question 4

Mechanical Transformations

Answer 4

Sum of kinetic energy and potential energy

Add K.E. and P.E. together

Ex. Falling, projectile, swings

Question 5

Calories

Answer 5

Unit used to measure how much energy you get from foods.

Energy from food

Ex. 1 calorie = 4,180j

Question 6

Other Energy Transformations

Answer 6

Effect of friction – friction and air is distance convert some to thermal energy

The friction effect where friction and air is thermal energy converted

Ex. Friction, electrical energy, potential energy