Chapter 2.2 Flashcards
Weight definition and formula
A force as the result of gravitational attraction between the mass of a body and the mass of the planet it is on.
W = mg
Tension
The force that arises in a body when it is stretched
Hooke’s Law as the tension force in a spring
T = kx
Contact force
The force between two bodies touching each other, perpendicular to the surface of the body exerting the force
Drag forces
Forces that oppose the motion of a body through a fluid
Upthrust
The force experienced when an object in a fluid is pushed upward
Dynamic friction
The friction that arises when one body slides over another
Static friction
The friction that prevents a stationary object from moving
Friction laws
The area of contact between two surfaces doesn’t affect frictional force
The force of dynamic friction doesn’t depend on the speed of sliding
Force of dynamic friction
Coefficient of dynamic friction multiplied by normal reaction force between the surfaces
Maximum force of static friction
Coefficient of static friction multiplied by the normal reaction force between two surfaces
Free-body diagram
A diagram showing the magnitude and direction of all the forces acting on a chosen body
Newton’s first law
When the net force on a body is zero, the body will move with constant velocity
Newton’s third law
A body exerting a force on another body will feel an equal and opposite force
Force pairs
Equal and opposite forces that act on different bodies
