2.07 Force, mass and acceleration Flashcards
What is inertia?
All objects resist a change in velocity, even if the velocity is 0. This resistance to change in velocity is called its inertia.
What is the relation between inertia and mass?
The more mass something has, the more inertia it has.
What is the relation between mass and acceleration?
Any change in velocity is an acceleration, so the more mass something has, the more difficult it is to make it accelerate.
What is resultant force?
The resultant force is described as the total amount of force acting on the object or body along with the direction of the body.
What is the relation between resultant force and acceleration?
If forces are balanced, the resultant force is zero and there is no acceleration. Any other resultant force causes an acceleration in the same direction as the resultant force.
What is the formula that links the resultant force acting, the mass and the acceleration produced?
resultant force= mass*acceleration
What will happen to a moving object that has no resultant force acting upon it?
It will continue moving at the same velocity.
Newton’s second law of motion
resultant force (N) = mass (kg) * acceleration (m/s^2)
F= ma
What is Newton’s second law in words?
The acceleration of an object is proportional to the resultant force acting on it, and inversely proportional to the object’s mass.
How can the link between force, mass, and acceleration be found experimentally?
We can prove the link experimentally by using a ticker tape timer, paper tape and trolleys that have mass.
Different forces are applied to the trolley by pulling it along with one, two or three elastic cords, stretched to the same length each time. During each run, the ticker-tape timer marks a series of dots on the paper tape. The acceleration can be calculated from the spacing of the dots. To vary the mass, one, two, or three trolleys are used in a stack.
Defining the newton.
1 newton is the force required to give a mass of 1 kilogram an acceleration of 1 m/s^2.
What are the three things that forces can affect?
Shape, volume or motion.
