sci Flashcards
is an object going up an effect due to gravitational force?
no, it is only going down that is an effect
mass changes depending on the place - t or f
false, only weight changes depending on the place
what happens to objects in space?
they become weightless
formulae for force?
f = mass x area
how to explain which object is more suitable for softer surface
contact area is larger -> less pressure exerted on ground -> object will not sink
formula for pressure?
p = force/area
SI unit for force
N
SI unit for work done/energy
joules (j)
when do you include “cpe of the student”?
when they say,, “a person…”
formula for work done/energy?
force x distance
formula for power
p = energy/time
what is the principle of conservation of engergy
energy cannot be neither created nor destroyed
it can only be converted form one form to another
do you need to calculate WD if the ans is zero?
yes
what is work done?
when an object moves in the same direction of the force exerted on the object
what is energy?
the ability to do work.
