Chapter 1: Motion and Equilibrium Flashcards Preview

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Flashcards in Chapter 1: Motion and Equilibrium Deck (19)
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1

Acceleration

The rate at which velocity changes with time

The change in velocity may be in magnitude or direction or both

m/s^2

2

Air Resistance

The force of friction acting on an object due to its motion in air

3

Equilibrium Rule

The vector sum of forces acting on a non-accelerating object equals 0

Net force= 0

Sigma F=0 Sigma means net force

4

Force

A push or a pull

5

Free Fall

Falling only under the influence of gravity; falling w/o air resistance

6

Friction

Restrictive force that opposes motion; When objects rub against one another

Exp: air resistance

7

Hang Time

The time that one's feet are off the ground during a vertical jump

8

Inertia

The property of things to resist CHANGES in motion

9

Kilogram

The unit of mass

= the mass of one liter of water at 4 degrees C

10

Mass

Measure of inertia of an object

11

Net force

Combination of all forces that act on an object

12

Newton

Scientific unit of force

13

Speed

Change in distance during a time interval

delta d/delta t

14

Support Force

aka Normal (perpendicular) force.

The force that supports an object against gravity

15

Vector

An arrow that has magnitude and direction

16

Vector Quantity

A quantity that has magnitude and direction

Opposite of a scalar quantity

17

Velocity

Speed of an object and specification of its direction of motions

18

Volume

The quantity of space an object occupies

19

Weight

The force due to gravity on an object

weight = mass X gravity