PHYSICS 1

Contact Force

Contact Force

Static Frictional Force

Dynamic Frictional Force

Relationship of Static and Dynamic Forces

1st Law of Gravitation

2nd Law of Gravitation

Law of Gravitation formula

G as constant in calculator

39

Force of gravity between earth and an object

Force of gravity between earth and an object with an altitude/height

RE Radius of the Earth value

ME Mass of the Earth value

Acceleration due to gravityS

SI unit of force

Newton N

SI equivalent unit of force

kg m/s²

SI unit of mass

kg

Si unit of acceleration

m/s²

cgs unit of mass

g grams

cgs unit of acceleration

cm/s²

cgs unit of force

dyne

cgs equivalent unit of force

g cm/s²

english/imperial unit of mass

slug and lbm

english/imperial unit of accelartion

ft/s²

english/imperial unit of force

lbf

english/imperial equivalent unit of force

slug ft/s²

relationship of lbm and slug (enhlish/imperial unit)

• slug > lbm

• 1slug = 32.2 lbm

english/imperial equivalent unit of force (another one)

32.2 lbm ft/s²

accelaration due to gravity (english/imperial)

32.2 ft/s²

solution for measuring weight of a person on an elevator with upward acceleration

N/(9.81 m/s²)

X-component of weight

Wsin(theta)

Y-component of weight

Wcos(theta)

Weight formula

mg

acceleration of object in an incline

gsin(theta)

Gravitational Potential Energy formula

Elastic Potential Energy Formula

Kinetic Energy formula

Work

Work formula

SI unit of displacement

m

SI unit of Work

J

SI equivalent unit of work

Nm

cgs unit of displacement

cm

cgs unit of work

ergS

cgs equivalent unit of work

dyne cm

english/imperial unit of displacement

ft

english/imperial unit of work

ft lb

equivalent unit of work in terms of stress

Pa m³

1N = how many dynes

100,000

1N = how many lbf

0.225

1 J = how many erg

10^7

1 J = how many ft lb

0.738

velocity formula

distance (x) / time (t)

1 kcal = how many J

4186

1 cal = how many J

4.186

Power formula

Work / time

Unit of power

Watts

Equivalent unit of power in terms of force

Nm/s

Equivalent unit of power in terms of acceleration

kg m²/s³

Momentum, P

mass in motion

Impulse, I

change in momentum

Momentum formula

Impulse formula

Conservation of momentum

[type of collision] momentum and kinetic energy is reserved

elastic

[type of collision] momentum only is reserved

Partially inelastic, perfectly inelastic

Coefficient of restitution (e) formula

Coefficient of restitution (e) for elastic

1

Coefficient of restitution (e) for partially inelastic

between 0 & 1

Coefficient of restitution (e) for perfectly inelastic

0

[TYpe of collision] stick together

perfectly inelastic