Forces Flashcards
(28 cards)
What type of force is thrust?
A force that prevents two objects coming together
What type of force is tension?
A force that prevents two objects moving away from each other
What type of force is weight ?
The size of the pull of gravity. Always acts vertically downwards
What type of force is resistance?
A force that opposes the motion is the particle
What type of force is friction ?
The resistance that one surface or object encounters when moving over another
What type of force is reaction force ?
When two objects come into contact, each exerts a force on each other : direction is perpendicular to surface of contact
What is equilibrium?
When a body is in rest/ constant velocity so no resultant force
What is the difference between mass and weight?
Mass is how much matter there is in an object, while weight is a Measure of the size of the pull of gravity on the object
What is newton’s 1st Law?
A body will stay at rest or at constant velocity unless acted upon by a resultant force
What does the notation R(⬆️) imply?
The resultant force in the vertical plane- taking upwards direction as positive
Draw a force diagram of a ladder on rough ground leaning against a smooth wall
How can forces be represented in i-j notation
Can be added and subtracted normally
i is the positive x axis
What is newton’s second Law?
The resultant force is directly proportional to the acceleration experienced by a body
What is the double arrow notation used to show?
The direction and magnitude of acceleration
What physical quantities can be represented as a vector or a scalar?
Vector : force, acceleration, velocity, displacement
Scalar: mass, area, volume
Connecting particles questions
What is Newton’s 3rd Law?
When two bodies A and B are in contact, if body A exerts a force on body B, then body B exerts a force on body A that is equal in magnitude and acts in the opposite direction
