Laws and formula's:
Monday, February 22, 2021 11:07 PM
How to solve problems?
d(distance)= the actual length between two points. Both of them is measured in meters(m) 1- Write the data.
s(displacement)= the shortest length between two points. 2- Write the formula.
3- Substitution.
• 2πr = full circle 4- Write the result and don
forget the units.
• s= r+r
• s=
• Speed(v)= d/t m/s
• Velocity(v)=s/t m/s
Avg speed= d1+d2+d3…../t1+t2+t3….
Avg velocity=s1+s2+s3…/t1+t2+t3….
• Acceleration= rate of change in velocity *if ∆v is + then a is + (acceleration).
*if ∆v is - then a is - (deceleration, retardation).
=
• Force: is a push or pull on an object that can cause a change in velocity,
direction and can cause it to accelerate.
• Uniform motion: a motion with constant velocity.(we don’t see it because of
the resistive external forces (air resistant, friction…)).
• Newtons first law: bodies continue in its state of rest or uniform • Newtons third: to every action there is an equ
motion in the absence of an balanced net force .(law of inertia) and a contrary reaction.
• inertia: the basic property which bodies resist any exterior forces • These forces are equal and in opposite
to remain in the same state whether at rest or motion. directions but they do not cancel each other
because they work on two different bodies.
• Newtons second law: the force applied on an object is equivalent to
the product of mass and acceleration. • Falling objects:
• F=ma ➢ The earth applies a force on free falling
• N=kg*m/s^2 objects.
• Second definition: the force applied on an object is equal to the ➢ Free falling objects is when an object falls
rate of change of momentum. under the influence of gravity only .
• F= ➢ When a body falls his velocity increases as
• Momentum = product of mass and velocity. well the acceleration.
• p=m*v ➢ The acceleration is due to gravity.
• Ns =kg*m/s
• Momentum give the total motion that a body possess.
• acceleration due to gravity: its equal to 9.8m/s
• Newtons law of gravitation: the gravity force between any or 10m/s2
two objects is “ directly proportional to the product of their • When a body is dropped on the surface of the
masses and inversely proportional to the square of the earth the velocity of the body increases by
distance between them.” 10m/s2 in 1s and when its thrown up the
• F=Gm1m2/r2 velocity decreases by 10m/s2 in each 1s of the
• G=6.6*10-11 motion.
• Terminal velocity: is when air resistant ac
formulas Page 1
Monday, February 22, 2021 11:07 PM
How to solve problems?
d(distance)= the actual length between two points. Both of them is measured in meters(m) 1- Write the data.
s(displacement)= the shortest length between two points. 2- Write the formula.
3- Substitution.
• 2πr = full circle 4- Write the result and don
forget the units.
• s= r+r
• s=
• Speed(v)= d/t m/s
• Velocity(v)=s/t m/s
Avg speed= d1+d2+d3…../t1+t2+t3….
Avg velocity=s1+s2+s3…/t1+t2+t3….
• Acceleration= rate of change in velocity *if ∆v is + then a is + (acceleration).
*if ∆v is - then a is - (deceleration, retardation).
=
• Force: is a push or pull on an object that can cause a change in velocity,
direction and can cause it to accelerate.
• Uniform motion: a motion with constant velocity.(we don’t see it because of
the resistive external forces (air resistant, friction…)).
• Newtons first law: bodies continue in its state of rest or uniform • Newtons third: to every action there is an equ
motion in the absence of an balanced net force .(law of inertia) and a contrary reaction.
• inertia: the basic property which bodies resist any exterior forces • These forces are equal and in opposite
to remain in the same state whether at rest or motion. directions but they do not cancel each other
because they work on two different bodies.
• Newtons second law: the force applied on an object is equivalent to
the product of mass and acceleration. • Falling objects:
• F=ma ➢ The earth applies a force on free falling
• N=kg*m/s^2 objects.
• Second definition: the force applied on an object is equal to the ➢ Free falling objects is when an object falls
rate of change of momentum. under the influence of gravity only .
• F= ➢ When a body falls his velocity increases as
• Momentum = product of mass and velocity. well the acceleration.
• p=m*v ➢ The acceleration is due to gravity.
• Ns =kg*m/s
• Momentum give the total motion that a body possess.
• acceleration due to gravity: its equal to 9.8m/s
• Newtons law of gravitation: the gravity force between any or 10m/s2
two objects is “ directly proportional to the product of their • When a body is dropped on the surface of the
masses and inversely proportional to the square of the earth the velocity of the body increases by
distance between them.” 10m/s2 in 1s and when its thrown up the
• F=Gm1m2/r2 velocity decreases by 10m/s2 in each 1s of the
• G=6.6*10-11 motion.
• Terminal velocity: is when air resistant ac
formulas Page 1
