Energy Forms
What type of energy is stored in chemical bonds?
chemical potential energy
How is energy transferred when an object falls?
gravitational potential energy converting to kinetic energy
What happens when two objects collide and bounce off each other?
an elastic collision
What is the force that acts between two objects with mass?
gravity
What do we call a push or pull on an object?
a force
What energy is stored by stretching or compressing an object like a spring?
elastic potential energy
Which method of energy transfer involves electric current?
electricity
What type of collision results in a loss of kinetic energy?
an inelastic collision
How do you calculate the weight of an object?
weight = mass x g (where g = 9.8 N/kg)
What is the unit of measurement for force?
a Newton
What do we call the energy possessed by moving objects?
kinetic energy
What kind of waves are used to transfer energy through electromagnetic radiation?
light, sound, radio, and heat waves
What can happen to the shape of objects when they collide?
their shape can change
What term describes the maximum speed a falling object can reach?
terminal velocity
What is the term for forces that are equal in size but opposite in direction?
balanced forces
What law states that energy cannot be created or destroyed?
law of conservation of energy
What happens to energy when two objects collide in an elastic collision?
energy is conserved and both objects rebound with the same kinetic energy
What type of energy do objects lose in an inelastic collision?
kinetic energy
What is the effect of air resistance on falling objects?
it opposes the motion and can balance the force of gravity
What do we call it when forces acting on an object do not cancel each other out?
unbalanced forces
What is the energy possessed by hot objects called?
heat energy
How does air resistance affect a falling object?
it causes some energy to be lost as heat energy
What happens to energy in a perfectly elastic collision?
no energy is lost as heat
What happens to gravitational force as distance increases?
it decreases
How do you calculate work done?
work done = force (N) x distance (m)