I’ve marked your HW jotters and will hand them back during tomorrow’s lesson.

I’ll go over the main issues in class but many of you need to review the way you attempt tension questions; use a free body diagram and only use F=ma when you know the resultant force.  These two videos should help.

## Nat5 solutions to acceleration hw

Sorry, folks.  I forgot to post the solutions to the last homework exercise.  See attached file which also includes the questions.

## Nat5 – solutions to scalar/vector hw exercise

Here are your solutions to the homework questions on scalar and vector quantities.  Check your own work against these answers and let me know if you need any further explanation to reach the answers shown.

## higher homework solutions – forces

Here are my worked answers to HW4 on forces.  Please speak to me if you still have questions and working through the attached file.

Note that other methods are possible for Q5a(ii), e.g. sine & cosine rules, or a scale drawing.

## AH homework solutions

Sorry for the long wait!  Here are worked solutions to the homework questions on calculus and special relativity.  Come and see me if you want to go over any of them.  Thanks.

## S3 homework solutions

Here are the solutions to the HW exercise I set before Christmas.  I am pleased to see so many of you showing full working.

## S3 wave equation

Here is the answer to the wave equation question.

## S3 amplitude

Here is the answer to the amplitude question.

## S3 frequency

This is the solution to the frequency question.

## S3 wavelength

Here is the answer to the wavelength question.