2.2.2 Mechanics (Kinetics)

Question 1

What are the equations that should be used for motion?

Answer 1

SUVAT equations

Question 2

What is the equation for distance?

Answer 2

Distance = Speed x Time

Question 3

What is 1 radian equal to in degrees?

Answer 3

57.3°

Question 4

2π radians = ?

Answer 4

360 degrees (or one revolution)

Question 5

At what height or time to fall taken, does an object falling means that the air resistance is negligible?

Answer 5

324ft or 4.5s (or less)

Question 6

What Greek letter represents angular velocity?

Answer 6

Omega ϴ

Question 7

What Greek letter represents angular acceleration?

Answer 7

Alpha α

Question 8

What is free vibration?

Answer 8

A mechanical system that is set off with an initial input, then is left to vibrate freely.
An example would be a child on a swing

Question 9

What is forced vibration?

Answer 9

An alternating force of motion applied to a mechanical system.
An example would be a shaking washing machine.

Question 10

What is resonance?

Answer 10

The tendency of a system to oscillate at maximum amplitude at a certain frequency. A small periodic driving force will cause large amplitude vibrations.

Question 11

What is the terminal velocity of an object?

Answer 11

When an object falling gets to terminal velocity, it has accelerated to a constant speed (115mph) and won’t increase after this.

Question 12

What is 1 revolution equal to in radians?

Answer 12

2π radians

Question 13

In SUVAT equations, what letter does Angular Velocity (w) replace?

Answer 13

U + V

Question 14

What is the angular velocity equation?

Answer 14

ω = angular displacement / time

Question 15

What is the linear velocity equation? (speed equation)

Answer 15

V = distance / time

Question 16

What is the equation that links linear velocity and angular velocity?

Answer 16

Linear Velocity = angular velocity x Radius
(V) = (ω) x R

Question 17

What formula is used for Time Period?

Answer 17

T = 1 / ƒ

Question 18

What is 1kW equal to in HP?

Answer 18

1.34HP

Question 19

What happens when airflow over a curved surface of an aircraft reaches Mach 1?

Answer 19

Normal shockwaves form and air pressure + density rise in its wake

Question 20

What happens to low speed air that passes through a convergent duct?

Answer 20

It increases in velocity and decreases in pressure

Question 21

What is another word for the Kelvin scale?

Answer 21

Absolute scale