Physics general

distance travelled by a moving object per unit time rate of change of distance scalar, s.i units are m/s

speed in a specific direction vector s.i units are m/s

area under the graph 1/2xbasexheight

speed=d/t distance=st time=d/s

max velocity an object attains when moving through fluids

quantity of matter in an object/substance measured in kg use a balance beam =mg

gravitational pull on an object measured in newtow use newton-meter

change shape/size of an object set a resting body into motion change the direction of a moving object increase/decrease the speed of a moving object can cause a body to wear out

where an object can undergo stretching and regain its original shape and size when the force is withdrawn

When an object doesn’t regain its shape and size after undergoing stretching/reformation

k=f/x

=change in length/change in force

1/gradient

the force acting normally or perpendicularly per unit area force/area the greater the area over which a force acts, the less the pressure P∝F

pressure in liquid increases with depth because the further down you go, the greater the weight of liquid above you HρG

quantity of motion possessed by a moving body s.i unit is kgm/s =massxvelocity

momentum=mv mass=m/v velocity=momentum/mass

change in momentum =mv-mug or ft

the rate of change of momentum is directly proportional to the external force that caused it force∝change in momentum

an object moving in its state of rest or motion in straight line unless it is compelled to change by an external force

for every action there’s an equal and opposite reaction

elastic and inelastic

where 2 cars collide and fuse/join together and travel at a common velocity

momentum is conserved kinetic energy isnt conserved