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Flashcards in Physics Exam terms Deck (15):
1

Distance

• Distance: the total length of the path an object travels. Distance is a scalar quantity (no direction).

2

Displacement

change in an object’s position. Displacement is a vector quantity.

Points from the initial position of an object to its final position.

3

Position

an object’s DISTANCE and DIRECTION from a particular reference point (ex: 24 m W of the school)

4

Speed

the change in distance over time (Scalar)

5

Velocity

average velocity describes the change in position over time

6

Acceleration

change in velocity over time

7

Force

pull or a push which acts upon an object as a result of the object's interaction with another object.

Force is a vector quantity. Unbalance forces can cause changes in motion.

8

Weight (mg)

force of gravity: force that acts on an object as a result of gravity.

Different from mass (amount of matter).

Weight changes depending on the gravitational forces whereas mass remains the same. →weight is the measure of pull of a planet

9

Newton

SI unit of force, named after Sir Isaac Newton (1 N = 1kgm/s2)

10

Net Force

also known as the resultant force, the overall force acting on an object taking into account the direction in which they are acting. The vector sum of all the forces acting on an object.

11

Normal Force

a perpendicular/SUPPORT force exerted by a SURFACE on an object in contact with the surface; the normal force always points away from the surface (PERPENDICULAR)

12

Applied Force

force that results when one object makes contact with another and pushes or pulls on it

13

Tension

a pulling force from a rope or string.

14

Friction

force that opposes the motion and acts in the opposite direction of the motion or attempted motion.

Friction is exerted by the surface of an object

15

Coefficient of Friction

the ratio of the force of friction to the normal force (no units)