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Newton's Law of Motion
Newton's Law of Motion
Linear momentum
Second laws of motion
F = m
Impulse
I =
Rocket propulsion
Thrust on the rocket
F = - u
Acceleration of the rocket
A =
Instantaneous velocity
Burnt out speed of the rocket
v
b
= v
max
= u log
e
Friction
Normal force N = mg
Normal force in inclined force N = mg cos
Coefficient of static friction
s =
Angle of friction tan
=
Resultant force exerted by surface on blck
S =
Sliding block on a horizontal surface coming to rest
Acceleration a = - m
re
g
Distance traveled by the block before coming to rest is
d =
Time taken by the block to come to rest
t =
Pulling a block or roller
The normal force is
N = mg - F sin
Force needed to just slide the body
F =
The minimum possible force among all directions required to just move the body
F =
Pushing a block or roller
The normal force is
N = mg + F sin
Force needed to just slide the body
F =
Block on a smooth inclined plane
N = mg cos
a = g sin
The time taken to slide down starting from rest from the top
T =
.
Velocity of block at the bottom of inclined plane
v =
Distance traveled up the plane
s =
Block on a rough inclined plane
Angle of repose
s = tan
f = mg sin
[mg sin
< f
s
], if
< a
f = f
s
=
s mg cos
[Mg sin
= f
s
], if
=
If the inclination is maintained at
,
a = g
Velocity at the bottom of the plane
v =
The distance traveled by the block up the plane the velocity becomes zero.
s =
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