Physics: Post your doubts here!

[Shaoli Hassan]

correct option is B

My bad....sorry. Yes, it is B. But can you please explain why?

 

[Thought blocker]

My bad....sorry. Yes, it is B. But can you please explain why?

10)
At X, sand is stationary and truck is moving so when they stick together the speed decreases.
At Y, sand also leaves with some speed and as the total mass remains same, the speed will not change.

 

[danial 234]

My bad....sorry. Yes, it is B. But can you please explain why?

thought blocker explained already

 

[mehria]

View attachment 45268

 

[Thought blocker]

View attachment 45270

LOL when did she asked this ?

 

[umair1161]

Hello guys!

Can you please help me with:

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_11.pdf

Question 20 please!

the answer is -------------------------------------------- C

Thanks in advance!

 

[Thought blocker]

Hello guys!

Can you please help me with:

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_11.pdf

Question 20 please!

the answer is -------------------------------------------- C

Thanks in advance!

mass = 800 * 1000
Work done = Energy
0.5 *m * v^2
0.5 * 800000 * 50^2 = 1 * 10^9

 

[ashcull14]

View attachment 45270

well explained

 

[Thought blocker]

well explained

She is just

 

[mehria]

LOL when did she asked this ?

she did ask ths.. n no one was explaining it to her so i did...

 

[ashcull14]

im posting all the ques i fail to do on the first attempt okay..ziada khush hone ki zarurat nhin hai..

 

[Shaoli Hassan]

10)
At X, sand is stationary and truck is moving so when they stick together the speed decreases.
At Y, sand also leaves with some speed and as the total mass remains same, the speed will not change.

Thanks a bucket! I am sorry I had not noticed your reply.

 

[mehria]

well explained

m glad that u got it

 

[Batguy]

please :'(

 

[Dr.MMM]

[quote="[/quote]
Please solve

 

[Wolfgangs]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w02_qp_1.pdf
Q36

 

[ParulS]

[quote="

Please solve View attachment 45275[/quote]
The answer is B.

 

[umair1161]

mass = 800 * 1000
Work done = Energy
0.5 *m * v^2
0.5 * 800000 * 50^2 = 1 * 10^9

ahh! well done mate! thanks alot!!

 

[Hijab]

mass = 800 * 1000
Work done = Energy
0.5 *m * v^2
0.5 * 800000 * 50^2 = 1 * 10^9

Can u plz plz solve this question ... I would be grateful

 

[NabzJ]

[quote="

Please solve View attachment 45275[/quote]
As the micrometer measures the DIAMETER of the rod... you read the value of the micrometer to be 3.81 mm. to find the cross sectional area of the rod.. you have to divide 3.81 by 2 = 1.905 mm (radius) ... we know we can find the area of something using [(pi)x(r)^2] so the cross sectional area equals (pi x 1.905^2) which then equals 11.4 mm^2 which is B!