Question

Write a short note on the following with example:-
a) Force
b) Work
c) Energy
d) Global Warning
e) Ozone depletion
f) Greenhouse Gas
g) Simple Machines
h) Levers
i) Fulcrum
j) Pulley
k) Frictional force
l) Volume
m) Weight
n) Density
o) Buoyant force
p) Hydrometer
q) Atmosphere
r) Opaque
s) Transparent
t) Translucent
u) Tides
v) Shadows​

Answer 1

Answer:

A force is said to do positive work if (when applied) it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force.

SI unit: joule (J)

In SI base units: 1 kg⋅m2⋅s−2

Derivations from other quantities: W = F ⋅ s; W = τ θ