Science Flashcards
Push or pull
Force
Applied on a object through direct pushing or pulling
Applied force
Force exerted by gravity; also known as weight; mass times gravity (gravity: -9.8m/s)
Gravitational force
Perpendicular to the surface an object is in contact with: if there’s no surface in contact
Normal force
Force present in springs
Elastic force
Force present in cables, strings, cords
Tension force
Force that impedes motion
Frictional force
Tendency of a body to resist any change in its motion
Law of intertia
Acceleration us directly proportional to the force and is inversely proportional to the mass
Law of acceleration
For every action, there is an equal and opposite reaction
Law of interaction
Any pull or push
Force
As how far an object is form where it started
Displacement
Product of force and displacement
Work
W =work in
Joules (J)
F=force in
N
d = displacement in
m
Rate of doing work ( P = W/d)
Power
P = power in
Watts (w)
W =work in
J
t = time in
s
Ability to do work
Energy
Energy possessed by an object by virtue of its position (PE = mgh)
Potential energy
PE = Potential energy in
J
m = mass in
Kg
g = gravity
( -9.8m/s)
h = height in
M
Energy present in moving objects. (1/2mv^2)
Kinetic energy
KE = kinetic energy in
J
m = mass in
Kg
v = speed in meter per second
(m/s)
Is produced by vibration. It requires a medium to be transmitted.
Sound
Part of wave where molecules are compressed
Compression
Part of wave where molecules are spread out
Rarefraction
Form of disturbance that carries energy from one place to another
Wave
Requires a medium for transmission
Mechanical wave
Doesn’t require any medium for transmission
Electromagnetic wave
Perpendicular to the direction
Transverse
Parallel to the direction
Longitudinal
Travels in a circular motion
Surface
