Physical Science chapter 15
What is kenetic energy? (KE)
the energy of motion
what is elastic potential energy?
the potential energy of an object that is stretched or compressed is known as elastic PE.
what is the conservation of mechanical enrgy equation?
KE+PE
what is the kenetic energy equation?
KE=1/2 * mass * velocity ^2
what is a quick definition of thermal energy?
atoms move fast, heat or light
KE equation for velocity?
v= The square root of 2 * KE over mass
what is work?
work is the product of force and distance
CHECK POINT: you exert a vertical force of 72 newtons to lift a box to a height of 1 meters. How much work is done to lift the box?
work=force x Distance work=72 x 1
what is the equation for work?
work=force x distance
an objects gravitational potential enegy depends on its?
mass, its height, and the acceleratoin due to the gravity 9.8m/s^2
wat are the six froms of energy?
mechanical thermal chemical electrical electromagnetic nuclear
what is a quick definition of mechanical enegey?
motion and position
what is the potential energy equation?
(PE)= mass* Gravity* height
CHECKPOINT:
A 60 hg person walks from the ground to the roof of a 74.8 m tall building. how much gravitational energy does she have at the top of the building?
KE equation for Mass?
M= 2 * (KE) over velocity ^2
what are the tw types of potential energy?
elastic and gravitational.
what is the quick definition of electrical energy?
electrical charges
what is energy?
energy is the ability to do work, and work iis a transfer of energy
What is potential energy? (PE)
energy that is energy as a result of postion(on a hill) or shape(ball rolling down a hill vs a box going down the hill).
what is the quick definition of electromagnetic enegy?
energy transferred by waves
for a force to do work on an object, some of the force must act?
in the same direction as the object moves
the kinetic energy of a moving object depends on?
its mass and speed
what are both energy and work typically measured in
joules (J) or one newton per meter
what is gravitational potential energy?
potential ebergy tha depends upon the objects height is called gravitational PE
what is the law of conservation of energy?
states that energy cano be created or distroyed
what is the quick definition of nuclear enegy?
stored in atom nuclei
what is the quick definition of chemical energy?
stored in chemical bonds