Force & Motion
What is the push or pull on an object that can cause it to accelerate called?
unbalanced force
Explain gravitational potential energy with examples
When an object falls to the ground, all of the PEG at the maximum height is converted to KE at the bottom
Could waves of different amplitude interfere?
The two interfering waves do not need to have equal amplitudes in opposite directions for destructive interference to occur
What is heat transfer?
the movement of heat from one substance or material to another
Are there any massless particles?
the gluon, the photon, and the graviton
What is the unit of measure for force?
A newton (N)
Explain elastic potential energy with examples
the potential energy stored by stretching or compressing an elastic object by an external force such as the stretching of a spring
What is a standing wave?
combination of two waves moving in opposite directions
What are the three main types of heat transfer?
conduction, radiation, and convection
Can gravity form waves?
Gravity waves form on the boundary of fluids with different densities
What is the sum of all forces acting on an object called?
net force
How is potential energy classified?
gravitational potential energy, elastic potential energy, electric potential energy
Can waves carry matter?
Waves transfer energy but not matter
Name two examples of conduction
cooking, boiling water
Do I weigh less on the equator than at the North Pole?
A person weighs more at the North Pole than at the Equator
In a tug of war, when one team is pulling with a force of 100 N and the other 80 N, what is the net force?
20 N
What is kinetic energy?
a property of a moving object or particle
What are the three most common waves?
transverse waves, longitudinal waves, and surface waves
Why is conduction less likely to happen in a gas?
the particles are closer together
all objects with mass, like our Earth, actually bend and curve the fabric of the universe, called spacetime
What force makes us move?
appiled force
Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat?
Yes and no
How do waves transfer energy?
In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields
How does convection current work in a pot of boiling water?
The hot water increases in thermal and molecular kinetic energy and rises as it becomes less dense
Why is gravity the strongest force?
it has the longest range and because there is no negative mass