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###### Displacement in A Level Mechanics

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2 years ago

Can someone tell me the answer with an explanation please

Positive Direction ------>

C-----------A------------B

What is the displacement from:

A to B,

B to A

A to C,

also can you explain why.

Positive Direction ------>

C-----------A------------B

What is the displacement from:

A to B,

B to A

A to C,

also can you explain why.

(edited 2 years ago)

The displacement between A and B is the distance between them, and it would be in the positive direction, whilst the displacement between B and A is the distance between B and A, but it has a negative direction. Did you mean to include any numbers, or vectors in your question?

(edited 2 years ago)

Reply 2

2 years ago

Original post by IJaguar

The displacement between A and B is the distance between them, and it would be in the positive direction, whilst the displacement between B and A is the distance between B and A, but it has a negative direction. Did you mean to include any numbers, or vectors in your question?

I just checked the answers, these are the results:

A to B: Positive Displacement

B to A: Positive Displacement

A to C: Negative Displacement

I just don't understand what determines whether it is positive or negative

Original post by Iggnhfgunn

I just checked the answers, these are the results:

A to B: Positive Displacement

B to A: Positive Displacement

A to C: Negative Displacement

I just don't understand what determines whether it is positive or negative

A to B: Positive Displacement

B to A: Positive Displacement

A to C: Negative Displacement

I just don't understand what determines whether it is positive or negative

I'm also confused now, I don't understand how A to B can be a positive displacement, whilst B to A is also a positive displacement. Are you sure the answers are correct?

Reply 4

2 years ago

B to A is negative brudda

Reply 5

2 years ago

Original post by YungLordRaf

B to A is negative brudda

Not according to the Answers in the back of the book and on Solution Bank Brudda

Original post by Iggnhfgunn

Not according to the Answers in the back of the book and on Solution Bank Brudda

As IJaguar said, both A->B and B->A cannot be positive. The latter must be a typo in the book, its negative.

(edited 2 years ago)

Reply 7

2 years ago

Original post by Iggnhfgunn

Not according to the Answers in the back of the book and on Solution Bank Brudda

stfu

Many eons ago, I made these slides with a basic intro to vectors. Maybe they'll be of use to you OP.

Original post by Iggnhfgunn

Not according to the Answers in the back of the book and on Solution Bank Brudda

If A to B is postive then B to A must be negative - either the question has an eroor or the answer is wrong.

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