Physics: Post your doubts here!

[champ-student]

i need help in this question plzzz
forces of 12 N and 5N act on same point but their direction can be varied.
what is their
a) greatest possible resultant
b)least possible resultant
(i know about greatest but not how to do part b)

 

[Minato112]

I know noting bout vectors.......
i know only a couple of formulae: Fx=F cos theta , Fy=F sin theta
need help

Check this : http://www.s-cool.co.uk/a-level/phy...evise-it/vectors-and-scalars-whats-the-differ
When u reach down the page, click next.

Hope it helps

 

[champ-student]

Check this : http://www.s-cool.co.uk/a-level/phy...evise-it/vectors-and-scalars-whats-the-differ
When u reach down the page, click next.

Hope it helps

thanx a lot.................

 

[champ-student]

Find the force on the car parallel to the slope:

The 2000 N force is already parallel to the slope so we can ignore it for a moment.
The 10 000 N is at an angle of 60 degrees to the slope so we need to use trigonometry to find its component parallel to the slope (look at the small triangle carefully):
Component parallel to the slope = 10 000 cos 60° = 5 000 N down the slope.
Now we can simply subtract the 2 000 N from the 5 000 N force as they are in opposite directions.
So the resultant force parallel to the slope = 5 000 - 2 000 = 3 000 N down the slope.
Now it's your turn!

 

[queen of the legend]

uhum why?

you minus them up because they are acting in different direction. so one negative is for direction and one is for the velocity. you can either think of it this way or you can use this better way for perfectly elastic collisions only where this equation applies
Ua-Ub= - (Va-Vb)

 

[champ-student]

you minus them up because they are acting in different direction. so one negative is for direction and one is for the velocity. well i am not really sure about my concept of this you better ask your physics teacher

OMG!!!!!!!! so simple..........!!!!!!!
thankzzz a lot................

 

[champ-student]

whats ans for ques 2???

 

[champ-student]

anyone there????????

 

[champ-student]

Which of these terms means the turning effect of a force?
a. Pivot
b. Lever
c. Momentum
d. Moment

 

[champ-student]

Which of the following is a renewable energy resource?
a. Natural gas
b. Wind
c. Nuclear fuel
d. Oil

 

[champ-student]

what is terminal velocity

 

[Silent Hunter]

Which of these terms means the turning effect of a force?
a. Pivot
b. Lever
c. Momentum
d. Moment

moment

Which of the following is a renewable energy resource?
a. Natural gas
b. Wind
c. Nuclear fuel
d. Oil

wind

what is terminal velocity

the constant velocity where the air resistance and weight are equall

 

[champ-student]

moment



wind



the constant velocity where the air resistance and weight are equall

thankx

 

[champ-student]

i m giving physics paper first time.....can anyone tell what is ATP?????

 

[champ-student]

A force is required to maintain the circular motion.
(i) Explain why a force is required.

 

[champ-student]

A plumber measures, as accurately as possible, the length and internal diameter of a straight
copper pipe.
The length is approximately 80cm and the internal diameter is approximately 2cm.
What is the best combination of instruments for the plumber to use?
internal diameter length
A rule rule
B rule tape
C vernier calipers rule
D vernier calipers tape

 

[nightrider1993]

i m giving physics paper first time.....can anyone tell what is ATP?????

Alternate to practical

 

[Asheeta]

A force is required to maintain the circular motion.
(i) Explain why a force is required.

so that the body does not fall towards the centre and it remains in an orbit

 

[Asheeta]

A plumber measures, as accurately as possible, the length and internal diameter of a straight
copper pipe.
The length is approximately 80cm and the internal diameter is approximately 2cm.
What is the best combination of instruments for the plumber to use?
internal diameter length
A rule rule
B rule tape
C vernier calipers rule
D vernier calipers tape

c. Vernier calipers rule

 

[Asheeta]

there are no specific quantities that should be learnt as i have been told ....i think you just have to guess them and i think its just stupid

good for u then thx anyways :/