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# chapter4studyguide

### the greater mass a moing object has

The greater mass a moving object has the more kinetic energy it has
A book and a feather sitting next to each other have different potential energies
Height is NOT used to calculate kinetic energy
Speed is NOT used to calculate potential energy
The potential energy of an object increases with its height
The kinetic energy of an object increases as its speed increases
Green plants convert light energy from the sun into chemical potential energy
The mechanical energy of a coconut falling from a tree remains constant
Gravitational potential energy depends on the mass and height and of the object and due to gravity
The primary source of sun's energy is nuclear fusion
Mechanical energy is the total amount of _____ and ________ energy in a system kinetic and potential
Energy is the ability to cause change
______________ is stored energy due to position potential energy
______________ is energy in the form of motion kinetic energy
The law of conservation of energy states that energy cannot be ________ or __________ created or destroyed
_______ is the unit used to measure energy in food calorie
__________________ is energy stored in chemical bonds chemical potential energy
________________ is energy stored by thing that stretch or compress. elastic potential energy
___________ is energy stored by things that are above earth. gravitational potential energy
The SI unit of energy is a joule
Friction causes some mechanical energy to change to thermal energy
Calculate the kinetic energy of a 100 kg cart moving at a speed of 7m/s. 2,450 Joules
Calculate the potential energy of a 10 kg sack of groceries on a shelf 1 m above the floor. PE = mgh = 10*9.8*1 = 98 Joules
What is the kinetic energy of a ball at the top of its flight? 65 joules
What is the potential energy of a 2 kg ball at the top of its flight if it is 100 m from the ground? 4
What is the mechanical energy of the ball from problem 29? 47
Created by: Katwill678