lacoste's PHYSICS questions

[lacoste]

Do you think it would be safe in physics to 'generally' put your answer to 2 decimal places?

I think 2 or 3 decimal places is the way to go, but not one. But always look at the question in case it asks for more.

Teacher said the the Physics examiners are lenient, and nice. They don't really care about the sig figs unless its too OUTSTANDING. Usually, they look for process work.

Don't rely heavily on the advice from the teacher though because if the exams are 'easy' then the examiners become really tight on sig figs i guess, when they do a massive recheck just like th e06 methods. i highly doubt that would happen to physics though

[lacoste]

Q1).

How do I do the anti-derivative of that to get to this ?


Q2). When do I use

compared to

[TrueTears]

Q1).

How do I do the anti-derivative of that to get to this ?


Q2). When do I use

compared to

Q1. so we know

[TrueTears]

Q2,

you use when you are given the initial speed, denoted by u.

you use when you are given the final speed, denoted by v.

[lacoste]

thanks true tears. i dont really get antidiff but is not a problem

q). When working out what the instantaneous speed of a question is, which varible is the unknown?

[Flaming_Arrow]

thanks true tears. i dont really get antidiff but is not a problem

q). When working out what the instantaneous speed of a question is, which varible is the unknown?

v?

[lacoste]

thanks true tears. i dont really get antidiff but is not a problem

q). When working out what the instantaneous speed of a question is, which varible is the unknown?

v?

Isn't 'v' the final velocity?

what does that mean in context regarding the instantaneous speed and 'v'?

cheers!

[Flaming_Arrow]

v is the final velocity
when they ask you to find instantaneous velocity they normally give you time or distance meaning v will be the final velocity at a particular instant.

[lacoste]

v is the final velocity
when they ask you to find instantaneous velocity they normally give you time or distance meaning v will be the final velocity at a particular instant.

Is instantaneous speed the exact same as instantaneous velocity?

[Flaming_Arrow]

v is the final velocity
when they ask you to find instantaneous velocity they normally give you time or distance meaning v will be the final velocity at a particular instant.

Is instantaneous speed the exact same as instantaneous velocity?

[lacoste]

I'm asked to find instantaneous Speed, not instantaneous Velocity ... unless they are related exactly. ?

[Flaming_Arrow]

I'm asked to find instantaneous Speed, not instantaneous Velocity ... unless they are related exactly. ?

it depends on the question really.
if your asked to find instantaneous speed and there is a direction given, you don't need to write direction
on the other hand, if its instantaneous velocity you will need to write direction only if its given.

[lacoste]

Yep, i get that. Speed is scalar. Velocity is vector. Thanks

But is instantaneous speed 'v'? and instantaneous velocity also 'v'?

[TrueTears]

speed is denoted by .

velocity is denoted by .

if u want to be technical

[lacoste]

speed is denoted by .

velocity is denoted by .

if u want to be technical

nope not technical, i just thought that there was another variable for instantaneous velocity


thanks flaming arrow and true tears !!