Basic physics (re)

Question 1

yayaya know ur symbol of units, use the book cuz we still want to learn a new technique

Answer 1

Okay

Question 2

Describe scalar quantity?

Answer 2

Only magnitude e.g. temperature = 20 degrees celsius

Question 3

Describe vector quantity?

Answer 3

Magnitude and direction e.g. velocity = 50 m/s East

Question 4

How do u resolve vectors?

Answer 4

SoH Cah ToA

Question 5

U wanna have the scalars and vectors? come and take it
(pg 6.)

Answer 5

okay

Question 6

Equation for horizonal component?

Answer 6

x = Z Cos ()

Question 7

Equation for vertical component?

Answer 7

y = Z Sin ()

Question 8

How to resolve several coplanar vectors?
(4 steps)

Answer 8

1. Resolve horizontal & vertical components
2. Add up horizontal components & vertical components respectfully
3. Calculate resultant using pythag’ theorem
4. Find angle using trigonometry

Question 9

1 tip for resolving several coplanar vectors?

Answer 9

• Consider force from other direction may be minused on the bigger force (also u can just do the minus during the calculation)

I mean this more like mental note yano

Question 10

Whats the contact force on a banked slope?
And how to calculate it?

Answer 10

Well it’s on the right angle ig?
And u do w x cos

Question 11

What’s the weight down slope on banked slope?
And how to calculate it?

Answer 11

Hypotenuse….
Also this one’s w x sin

Question 12

How to find w? (weight)

Answer 12

= mg (Mass x Gravity)

Question 13

Equation for p? (density)

Answer 13

= m/v (Mass/Volume)

Question 14

Define C of Mass

Answer 14

The point where total mass of object can be treated as a single point

Question 15

Define C of Gravity

Answer 15

Single point within a body at which entire weight of body may be considered to act

Question 16

What steps to finding CoG using plum line?

5 steps

Answer 16

1. Hang object freely from 1 corner
2. Draw line from suspended plumbline you’ve hung as well
3. Hang object from another corner
4. Repeat step 2
5. Where line meets = CoG

Question 17

The condition of CoG & CoM to coincide?

Answer 17

When there’s a uniform gravity present in the region

Question 18

What can cause vehicle to tip over?

Answer 18

When CoG passes point of pivot

Question 19

How to increase size of moment?

Answer 19

• Increase force
• Increase perpendicular distance between force and pivot

Question 20

Unit of moment?

Answer 20

Nm

Question 21

What principle of moments state?

Answer 21

When in rotational equilibrium, sum of clockwise moments must = sum of anti-clockwise moments

Question 22

What the 2 conditions for a system to be in equilibrium?

Answer 22

No net force
No net moment

Question 23

Define moment of a force?

Answer 23

The turning effect of a force applied to a rotational system at a distance from the axis of rotation

Question 24

Page 29 and onwards are all the questions, i advise u answer basically the homework again off by heart assuming that u did revise everything up until here. But ye take ur time, understand ur shit, technique type shit

Answer 24

okay