This discussion is now closed.

Check out other Related discussions

- Alevel chemistry mechanisms reagent and conditions urgent help !! (Year 2)
- recapping key skills for maths, but the PPQs make that completely irrelevant?
- Is the physics in an Engineering degree much harder than A Level physics?
- Missing out a Question in an Exam (Deliberately)
- Does University Of Manchester often go into clearing?
- Mechanical engineering Bristol, Bath, Sheffield
- Worried about studying Chemistry at UNI
- University of Birmingham - The School of Engineering Mathematics Aptitude Test
- What is engineering like?
- resolving forces
- Alevel Chemistry Aromatic Compounds
- Unveiling My Journey into Engineering: Seeking Your Valuable Input
- A level help!!
- my question is about a level
- Chemistry vs chemical engineering
- Is university of Sheffield good for math?
- A level options
- Please help me
- OCR B (MEI) Y420/01 - Core Pure - Wednesday 22nd May 2024 - [Exam Chat]
- Arkwright Scholarship 2024 Y11s

How do you do the following 2 questions? I haven't been told how to do it by my teacher, I assume you learn it in Add maths which I didn't do...

1) A, B and C are three points lying in that order on a straight line. A body is projected from B towards A with speed 3m/s. The body experiences an acceleration of 1m/s squared towards C. If BC=20m, find the time taken to reach C and the distance travelled by the body from the moment of projection until it reaches C.

2) A train travels along a straight piece of track between 2 stations A and B. The train starts from rest at A and accelerates at 1.25m/s squared until it reaches a speed of 20m/s. It then travels at this steady speed for a distance of 1.56km and then decelerates at 2m/s squared to come to rest at B. Find:

a) The distance between A to B

b) The total time taken for the journey

c) The average speed for the journey

Any help would be appreciated.

1) A, B and C are three points lying in that order on a straight line. A body is projected from B towards A with speed 3m/s. The body experiences an acceleration of 1m/s squared towards C. If BC=20m, find the time taken to reach C and the distance travelled by the body from the moment of projection until it reaches C.

2) A train travels along a straight piece of track between 2 stations A and B. The train starts from rest at A and accelerates at 1.25m/s squared until it reaches a speed of 20m/s. It then travels at this steady speed for a distance of 1.56km and then decelerates at 2m/s squared to come to rest at B. Find:

a) The distance between A to B

b) The total time taken for the journey

c) The average speed for the journey

Any help would be appreciated.

I assume you know the equations of constant acceleration (sometimes called 'suvat' equations... v = u + at and all those)?

1) How long does it take for B to come to a halt? What's the distance travelled in that time? B then continues to accelerate towards C; what distance does it have to cover to get to C?

2) Draw a speed/time graph.

1) How long does it take for B to come to a halt? What's the distance travelled in that time? B then continues to accelerate towards C; what distance does it have to cover to get to C?

2) Draw a speed/time graph.

1. As in all mechanics question, produce a sketch of the system. The actual mathematics behind this is fairly straightforward, but the concepts are what is important in this question. The particle is moving in one direction (towards A) but experiences a deceleration in this direction. Therefore, eventually, it's going to decelerate until it begins to accelerate and move in the other direction, finally reaching C.

You'll have to use the equations of motion. Firstly, what are the values of initial velocity, acceleration and displacement? [Take care of the signs]. Substitute these into a suitable equation i.e. one which features the variables you have and need. As for the second part, think of how the particle moves. At the point where it stops in order to reverse direction, what can you say about its velocity? Use this to find the distance travelled from B to this point. Then working out the final distance is fairly straightforward.

You'll have to use the equations of motion. Firstly, what are the values of initial velocity, acceleration and displacement? [Take care of the signs]. Substitute these into a suitable equation i.e. one which features the variables you have and need. As for the second part, think of how the particle moves. At the point where it stops in order to reverse direction, what can you say about its velocity? Use this to find the distance travelled from B to this point. Then working out the final distance is fairly straightforward.

- Alevel chemistry mechanisms reagent and conditions urgent help !! (Year 2)
- recapping key skills for maths, but the PPQs make that completely irrelevant?
- Is the physics in an Engineering degree much harder than A Level physics?
- Missing out a Question in an Exam (Deliberately)
- Does University Of Manchester often go into clearing?
- Mechanical engineering Bristol, Bath, Sheffield
- Worried about studying Chemistry at UNI
- University of Birmingham - The School of Engineering Mathematics Aptitude Test
- What is engineering like?
- resolving forces
- Alevel Chemistry Aromatic Compounds
- Unveiling My Journey into Engineering: Seeking Your Valuable Input
- A level help!!
- my question is about a level
- Chemistry vs chemical engineering
- Is university of Sheffield good for math?
- A level options
- Please help me
- OCR B (MEI) Y420/01 - Core Pure - Wednesday 22nd May 2024 - [Exam Chat]
- Arkwright Scholarship 2024 Y11s

Last reply 2 weeks ago

STEP 2 in 2024: Sharing Your Story! [PLUS WITH SOME SOLUTIONS AND PREDICTION]Maths

19

80

Last reply 2 weeks ago

A level maths paper 2 (pure and statistics) and paper 3 (pure and mechanics) ocrMaths

4

6

Last reply 2 weeks ago

STEP 2 in 2024: Sharing Your Story! [PLUS WITH SOME SOLUTIONS AND PREDICTION]Maths

19

80

Last reply 2 weeks ago

A level maths paper 2 (pure and statistics) and paper 3 (pure and mechanics) ocrMaths

4

6