Work and Kinetic Energy
Unit of work is unit of energy i.e joule (J)
hence
1 J = 1 N m
F cos
θ
= m a
(F = constant)
a = F cos
θ
/m
( a =
constant)
v
2
= v
0
2
+ 2 a d
½ m v
2
– ½ m v
0
2
= F d cos
θ
K
f
– K
i
=
Δ
K = W
W = F d cos
θ
=
F. d
W = F d cos
θ
=
F. d
Δ
K = W