P8 Flashcards
Displacement?
Distance in a given direction.
Deiving force?
Force of a vehicle that makes it move (also knkwn as motive force.
Forces?
A force can change the motion of an object.
Free-body force diagram?
A diagram that shows the forces acting on an object without any other objects or forces shown.
Friction?
The force opposing the relative motion of two solid surfaces in contact.
Magnitude?
The size or amount of a physical quantity.
Newton’s first law of motion?
If the resultant force on an object is zero, the object stays at rest if it is stationary, or it keeps moving with the same speed in the same direction.
Newton’s third law of motion?
When two objects interact with each other, they exert equal and opposite forces on each other.
Parallelogram of forces?
A geometrical mathod used to find the resultant of two forces that do not act along the same line.
Resultant force?
A single force that has the same effect as all the forces acting on the object.
Scalar?
A physical quantity, such as mass or energy, that has magnitude only.
Vector?
A vector is a physical quantity, such as displacement or velocity, that has a magnitude and a direction.
