a push or a pull that acts on an object due to the interaction with another object
measured in newtons with newtonmeter
vector quantity
any quantity that has both magnitude ( size) and direction
1.Friction
2.Magnetic
3Air resistance
4Electrostatic
5Upthrust
6Magnetic
the force that opposes the movement of objects through air
the force that opposes motion
the force that causes by weight
the force experienced by objects when theyre placed into fluid
repulsive or attractive forces between particles that are caused by their electric charge
the force apply to an object to one direction is greater than the force apply to the opposite direction
doesn't change shape but will break e.g. glass
it dont break easily
return to their orginal shape when the forces are removed
retain their new shape
1) set up equipments as in diagram
2) pull the newtonmeter until mass is just about to move
3)remove 100g and repeat step 2
4)repeat until all mass removes then do it all again
5)plot a graph of force against mass
a flow of electrical charge
-measured by an ampmeter
- I = P/V
-I = Q/T
the point where the point is said to act from
- usually at the center of an object
the sum of thinking distance and braking distance
the distance travelled by a vehicle b4 the brakes are applied
- affected by speed of the vehicle + reaction time of the driver
the distance travelled by a vehicle after the brakes are applied until the moment when the vehicle completely stops
-affected by mass + speed of the vehicle
-road surface
-quality of the brakes and tyres
when falling objects velocity remains constant ( they are still falling but not accelerating or decelerating )
the combination of all the forces acting on an object
force = spring constant x extension
- k( newton ). cm or m
an object will remain at rest or constant velocity unless acted upon a net force
Net force = mass x acceleration
for every action , there is an equal and opposte reaction
moment = force x perpendicular distance
avg speed = distance / time
current x time
symbol Q
unit : coulomb
Q=IT
the spray paint gun is charged positively , causes every paint particle to become posetively charged - since all paint particles have the same charge , they repel each other and produce a fine mist of paint .
the process which atoms lose or gain electrons to become charged
can gives you electric shock , you need to earth the object
E = I x V x T
E = Q x V
E= P x T
measured in joules
displacement = vector
distance = scalar
the rate at which energy is transferred
P=IV
watts
volts - measure the energy trasferred per coulomb of charge
V= P/I
V= E/Q