Chapter 35- Moments, Levers And Centre Of Gravity Flashcards Preview

Physics > Chapter 35- Moments, Levers And Centre Of Gravity > Flashcards

Flashcards in Chapter 35- Moments, Levers And Centre Of Gravity Deck (15)
Loading flashcards...
1

Fulcrum/axis

The pin/fixed pin/point object moves from

2

How to calculate moment

Force X perpendicular distances of line of force to the fulcrum

3

Equation for lever's ability

Smaller force x large distance= small distance X larger force

4

Lever

A rigid body that can turn about a fixed point called a fulcrum

5

Effort

The force applied to the lever

6

Load

The weight N lifted / moved by the lever

7

Law of The Lever

-when a lever is balanced, the sum of the clockwise moments = the sum of the anti-clockwise moments

8

Centre of gravity

A point in the object through which all the weight of the object appears to act

9

Equilibrium

When something is perfectly balanced

10

Stable equilibrium

-ball will return to the same position if lightly pushed
Eg. In a bowl

11

Unstable equilibrium

The ball won't return to the same position of lightly pushed eg. Small ball on a larger ball

12

Neutral equilibrium

Ball will return to a similar position if lightly pushed
Eg. Ball on a flat surface

13

Hen will/won't an object topple onto it's side?

•if the weight acts through the base, it will not topple
•if the weight acts outside of the base it will!

14

To improve stability of an object

-use a wide base
-lower the centre of gravity

15

Moment

How much spinning an object will do if force is applied to it