Flashcards in Motion and Forces 1 Deck (13):

1

## How to solve an equilibrium question

### Make a triangle and use trigonometry

2

## Is Centripetal force a force?

### No, centripetal force is a net force

3

## What conditions are you able to use the motion formulas?

### When acceleration is constant

4

## What happens when a car goes over a speed bump

### when a car goes over a speed bump, the normal reaction becomes less than the weight of the car

5

## Define conical pendulum

### A ball ganging on a string and going round in a horizontal circle

6

## Geosynchronous satellite

### Satellites that travel above any great circle

7

## Define Lever

### A lever is a device for amplifying forces. Longer lever=more amplification

8

## Kepler's first law

### The law of orbits: All planets move in elliptical orbits with the sun at one focus

9

## Kepler's third law

### The law of periods: The square of the period of a planet's orbit is proportional to the cube of the mean radius of its orbit

10

## C.Force of a string attached to an object spun vertically

###
At highest point: F(c)=T+F(w)

At lowest point: F(c)=T-F(w)

If F(c)=F(w), then tension is zero and the string can go slack

11

## Equilibrium of an object

### An object at equilibrium has constant velocity, thus there's not net force or torque

12

## Geostationary satellite

### A satellite that's directly above a single point in the equator that has an orbit period of 24 hours

13