forces 07/02/23 Flashcards
what is elsatically deformed?
can go back to its original shape/size when force is removed
what is inelastically deformed
cant go back to its original shape/size when force is removed
describe the energy transfer when an object is inelastically deformed
ALL the energy is transferred to elastic potential energy store
what is a vector quantity, with examples
committing crimes of both distance, and MAGNITUDEEEEE
e.g. velocity
what is a scalar quantity, with examples
just magnitude
e.g. speed
examples of contact force
normal contact force, friction, air resistance, tension
examples of a non-contact force
gravity, magnetic, electrostatic
3 things that can happen to an object (w/ two forces ig)
• Bend • Stretch • Compress
the stiffer to material the greater the _______ ___________
spring constant
what is the limit of proportionality
when the extension is no longer proportional to the force
explain why you don’t move when you lean on a wall even though you’re exerting a force?
the forces are in equilibrium. As the man pushes on the wall with normal contact force, the exact same force of the same size acts back upon him.
what is the equation for force
RESULTANT force = mass x acceleration
what is newton’s first law
says that a resultant force is needed to change motion
to make something start moving, speed up, or slow down
newtons ___ law:
acceleration is proportional to the __________ ________
2nd
resultant force
what terminal velocity
the velocity reached when the weight is balanced by air resistance
what is stopping time
thinking time + breaking time
why should you use a line graph over a bar chart
line graphs show continuous data
