forces and movement Flashcards
what is a force
a push or pull on an object caused by it interacting with something
forces usually act in…
pairs
forces always act in a….
certain direction
how are forces measured
with newton meter
what arae non-contact forces
froces that can act between objects that aren’t touching (gravity)
what do balanced forces do
produce no change in movement
what forces are on a book that is on a table
gravity pulls the book down
equal reaction force pushes up on the book
why doesn’t the book move from the table
the book doesn’t move
whzt do unbalanced forces change
it changes the speed and/or direction of moving objects
what forces are on a car when it is being pushed
there is a push force on a car
frictional force resisting motion
why does the car move
because the forces are unbalanced
what must the forces be to speed up/ start moving an object
the forces must be larger then resisting forces acting on object
what must the forces be to slow down / stop moving an object
resisting forces must be larger than forces moving the object
what can can forces make objects do
make the change shape (stretching, bending, compressing, twisting)
what must forces be to cause an object to change direction
forces must be different direction to objects original direction
can forces make an object turn. True or False
True
what can determin the amount the object changes
the size and direction of the force
