Chapter 1: Motion, Forces and Energy (Pt. 5) Flashcards
What is the resultant force?
The vector sum of the force action on the subject.
What happens when two forces act in the same direction?
What happens when two forces act in the opposite direction?
What happens when there are two or more forces parallel to each other?
What happens when there is no resultant force?
The body remains at rest or continues to move at constant velocity in a straight line
What is friction?
The force that opposes the motion of an object
When surfaces in contact move relative to each other, kinetic energy is converted to thermal energy
What is drag force?
Frictional force from a fluid
What is air resistance?
another type of frictional force that acts opposed to the relative motion of any object moving respect to a surrounding fluid.
What is Hooke’s law
Resorting force of a spring is directly proportional to a small displacement
What is newton’s second law?
Where is the net force acting on when an object travels in a circular path?
towards the center of the circle
What is required for an object to travel in circular motion?
What is the turning effect of a force?
The turning effect of a force is called moment
How can you increase the moment of a force?
How do you calculate moment?
How do you determine the centre of gravity?
What effects the stability of an object?
