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Mechanics help

Hi could someone help me out with question 9 and 13a) and b) please. I've attached some working, for 9 I know I have to consider energy but I'm not sure where to go next. I've attached what I've drawn for 13 but again I'm not sure where to go next.( see lower down for attachments)

(edited 8 years ago)

Reply 1

the bear

no attachments :captain:

Reply 2

Firefox23

Attachments did not load so they are here edexcel sending.jpg

Attachment not found

Original post by the bear

no attachments :captain:

They didn't load so are attached in a reply further down

Reply 4

JP0458B

Sorry to hijack but could someone also help me with q1a?

ImageUploadedByStudent Room1443549788.950071.jpg

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Reply 5

Indeterminate

Original post by Don Joiner

Sorry to hijack but could someone also help me with q1a?

ImageUploadedByStudent Room1443549788.950071.jpg

Posted from TSR Mobile

Sure.

All you need to do is use

v=u + at

and you know what v, a and t are.

Reply 6

JP0458B

Original post by Indeterminate

Sure.

All you need to do is use

v=u + at

and you know what v, a and t are.

Thanks! What about B? I know it must be when j = 0 but I'm not sure what equation to form

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Reply 7

Indeterminate

Original post by Firefox23

We're not meant to post full solutions :smile:

Reply 8

Firefox23

Original post by Indeterminate

We're not meant to post full solutions :smile:

😁 sorry it's deleted

Reply 9

JP0458B

Am I being stupid and missing something on question b?

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Reply 10

Indeterminate

Original post by Don Joiner

Am I being stupid and missing something on question b?

Posted from TSR Mobile

"Parallel to i" just means that, at that point in time, P is going in the same direction as i. In other words, it's not going up/down any kind of "slope"

Can you use the same method as in a) to create an equation to solve for t?

Reply 11

Firefox23

I've now completed 13a) but if someone could help me out with b and question 9 I'd really appreciate it!

Reply 12

A.McCall

Original post by Firefox23

I've now completed 13a) but if someone could help me out with b and question 9 I'd really appreciate it!

I would love to help but seen as though you haven't indicated what the question is asking that is impossible. Also I'm guessing this is M2?

Reply 13

Firefox23

Original post by A.McCall

I would love to help but seen as though you haven't indicated what the question is asking that is impossible. Also I'm guessing this is M2?

Sorry it's the questions from the first message of the thread but they're here. I've attached my working for question 9 but I'm not sure where to go next. For 13b I do 't really know where to start. I think it is mostly m2, it's pre course work for university that I have to complete and these are the last two questions that I have to do.

Attachment not found