Flashcards in Section 5.1 - Further Mechanics Content Deck (18)

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1

## What is the term given to an object rotating at a steady rate?

### Uniform circular motion

2

## If an object is travelling in a circle in the vertical plane, where are the points of minimum and maximum tension?

###
Minimum tension at the top

Maximum tension at the bottom

3

## Define centripetal force

### The force that makes the object move in a circle

4

## Why do planes turn when at an angle?

###
The lift force is comprised of a horizontal and vertical component.

The horizontal component provides the centripetal force causing it to turn.

5

## What kind of motion will a pendulum perform?

### Simple harmonic motion

6

## What is the period of oscillation?

### The time for one complete cycle of oscillation.

7

## If a trolley is at equilibrium attached to two springs, when pushed in one direction, what will the trolley do and why?

###
It will accelerate toward the equilibrium point.

The extended spring provides a restoring force.

8

## If the graph of displacement is sin(x), what will the respective graphs of velocity and acceleration look like?

###
Velocity as cos(x)

Acceleration as -sin(x)

9

## Describe a freely oscillating object

### It oscillates with a constant amplitude because there is no friction acting on it.

10

## What is natural frequency?

### The frequency of free oscillations of an oscillating system.

11

## What are forced vibrations?

### Making an object oscillate at a frequency that is not it’s natural frequency

12

## When does resonance occur?

### When the driving force or oscillation matches the natural frequency of the system.

13

## What is the outcome of resonance?

### An increase in amplitude of the system’s oscillation.

14

## What is damping?

### The term used to describe the removal of energy from an oscillating system.

15

## What are the three levels of damping?

###
Light

Heavy

Critical

16

## Describe light damping of a system

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The system oscillates over a long time frame before coming to rest.

The amplitude of the oscillations follow a decay envelope.

17

## Describe heavy damping

###
The oscillating system returns to zero over an extended time frame.

(No discernible oscillation)

18