Newton's Laws of Motion Flashcards
What is Netwon’s First Law of Motion?
If the resultant force acting on a stationary object is zero, then the object wil remain stationary [STATE OF REST]
If the resultant force acting on a moving object is zero, the object will continue moving in the same speed and direction,so a constant velocity [UNIFORM MOTION]
What is the tendency of objects to remain in their state of rest or uniform motion called?
Inertia
What is state of rest?
When the resultant force acting on a stationary object is zero the object will remain stationay
What is uniform motion?
When the resultant force acting on a moving object is zero, the object will continue moving at the same speed in the same direction, so at a constant velocity
The velocity of an object will only change if a _ _ _ _ _ _ _ _ _ is acting on it
Fill in the blank
The velocity of an object will only change if a resultant force is acting on it
What is inertia?
Inertia means that an object in motion will remain in motion at the same speed and direction unless acted on by a resultant force
Or
A stationary object will remain stationary unless acted on by a resultant force
What is Newton’s Second Law of Motion?
The acceleration of an object is prpoprotional to the resultant force acting on the object and indirectly proportional to the mass of the object
What is the equation for Newton’s Second Law?
Resultant Force = Mass x Acceleration
What are the units of acceleration?
Metres per second squared (m/s2)
What is the definition of inertial mass?
words
Inertial mass is the meausre of how difficult it is to change the velocity of an object by using the raito of resultant force/acceleration
What is Netwon’s Third Law of Motion?
When two objects interact, the forces that they exert on eachother are equal and opposite
What is the equation for acceleration?
Change in velocity/ Change in time
How do we quantitavely express inertial MASS
A ratio of force : acceleration
In Newton’s second law of motion equation what does the F stand for ?
Resultant force
How do you convert gravity as 9.8N/Kg into just Newtons?
Multiply the 9.8 by the mass (in Kg) given
so it will go from N/Kg to just N as its no longer being divided by the Kg but was multiplied by it.
