Topic P5 Forces Flashcards
what do vector quantities have
-magnitude
-associated direction
what are scalar quantities
they only have magnitude and no direction
how is a vector quantity represented
by an arrow
-the length of it represents magnitude
-direction of it represents the direction of the vector quality
what is a force
a push or pull that acts on an object due to the interaction with another object
state 2 forces
-contact
-non contact
what is a contact force
the objects are physically touching
what is a non contact force
the objects are physically sepreated
state examples of contact forces
-friction
-air resistance
-tension
state examples of non contact forces
-gravitational force
-electrostatic force
-magnetic force
state the interaction between pairs of objects that produce a force on each object
-sun and earth are attracted to each other by gravitational force
-this is a non contact force
-sun is attracted to the earth arrow going right
arrow going left earths attracted to the sun
what is a resultant force
a number of forces that act on object may be replaced by a single force that has the same effet as all the orginal forces acting together
how to calculate the resultant force
use scale drawings
-draw all the forces that act on an object to scale and tip-to tail
-then draw a straight line from the start
understand the forces
state what happens when you apply a force to an object
causes it to
-stretch
-compress
-bend
how does an object be elastically deformed
-if it can go back to its original shape and length after forces removed
called elastic objects E.G SPRINGS
