You are Here: Home >< Maths

Mechanics Kinematics help! Watch

A lift ascends from rest with an acceleration of 0.5m/s/s before slowing with an acceleration of -0.75m/s/s for the next stop. If the total journey time is 10 seconds, what is the distance between the two stops?

Clare is driving along a road in her car, with Henry following 40m behind his car. They are both travelling at 25m/s. Clare spots a problem ahead, and brakes to a halt, with acceleration -5m/s/s. Henry takes 0.2 seconds to react, then brakes, but his brakes are less well maintained and only provide an acceleration of -4m/s/s. Investigate what happens.

I'm really weak at these types of combine kinematics. If you have any tips on solving these kind of problems better please let me know too
2. (Original post by liemluji)

A lift ascends from rest with an acceleration of 0.5m/s/s before slowing with an acceleration of -0.75m/s/s for the next stop. If the total journey time is 10 seconds, what is the distance between the two stops?

Clare is driving along a road in her car, with Henry following 40m behind his car. They are both travelling at 25m/s. Clare spots a problem ahead, and brakes to a halt, with acceleration -5m/s/s. Henry takes 0.2 seconds to react, then brakes, but his brakes are less well maintained and only provide an acceleration of -4m/s/s. Investigate what happens.

I'm really weak at these types of combine kinematics. If you have any tips on solving these kind of problems better please let me know too
For your first one, split it up into two distinct stages and don't be afraid to get some unknown parameters going that you can then find/solve.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 18, 2016
Today on TSR

What should I do?

US couple arrested - 13 children chained up

Discussions on TSR

• Latest
• See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants

Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE