Science test 1

density = mass/volume

• p=m/v

average speed= distance/time

• _
• v =d/t

acceleration=change of velocity/time


=final velocity-initial velocity/time

a=v_final-v_initial/t

average velocity=final velocity+initial velocity/2

• _
• v = final v + initial v /2

distance=1/2(acceleration)(time)^2

force=mass x acceleration

f=ma

• weight=mass x acceleration due to gravity
• w=m(g)

momentum=mass x velocity

p=mv

change of momentum=force x time

centripetal acceleration=velocity squared/radius of circle

centripetal force=(mass x velocity squared)/radius of circle

f=mv^2/r

gravitational force=constant x (onemass x another mass)/distance squared

f=g (m1m2)/d^2

work=force x distance

w=fd

power=work/time

p=w/t

gravitational potential energy=weight x height

PE=mgh

kinetic energy=1/2(mass)(velocity)^2

KE=1/2mv^2

acceleration due to final velocity=square root of (2 x to gravity x height of fall)

final v=sqrt 2gh